I've had my FT-60 for several months and have actually been quite happy with it. Display is fine, HR signal is good. The HR strap is picked up by my Lifespan Fitness treadmill and my Concept2 Rowing Machine (Erg). I like the Fitness Test, the zone analysis, and love the Star Program. The Flow link data capture system has worked very well and very easily, capturing data to Polarpersonaltrainer.com, which is good but not great. More on that below.
If the FT-60 existed in a vacuum, I'd give it 4.5 stars. So why 3?
The problem is when viewed in the context of the whole polar line (not to mention Garmin). Polar has a very bizarre approach to product features. Generally, as you move up a product line, you add more and more features. You don't generally lose features. If you're willing to pay the cost, you get more. Not so with Polar. They seem to just randomly distribute features among their many models. Each model has a very distinct mix of features; based on someone's idea of its ideal user (I'm giving them much more credit for thoughtful design than I suspect they deserve). As other reviewers have mentioned, it's as if each model was designed in a vacuum, by teams who have only the barest idea of what the others are doing. It would appear that no one at Polar oversees the whole product line and makes sure that things makes sense. What this means is that if you happen to want just that particular set of features found in one model, you might be in luck. But for many (like me), no matter how much you'd be willing to spend, you won't find all the features you want in one place. Worse, unlike Garmin, Polar has multiple sets of accessories that are not compatible across the line, so if you happen to change HRMs, it's likely you'll need to replace your accessories (footpod, GPS, data capture).
The FT-60 uses the Flow link for data capture, which works well. But only about 4 models use this. Should you change models (or perhaps another family member has a different one, or perhaps you want another one for a different purpose), you're probably going to need to pay for another data capture system. (As far as I can tell, none of the models let you have multiple users, so every family member needs their own HRM). The FT-60 is somewhere near the middle of their line, but you can't get any accessories to use with a bike for speed or cadence. The footpod that works with this model doesn't capture cadence data for runners.
The next model "up" is the FT-80. If you read the literature, you might think the primary difference is that the FT-80 adds strength training features and a graphical display. What you might not realize is that it also works very differently with polarpersonaltrainer (PPT). The FT-80 captures minute by minute HR data, the FT-60 does not. You can only save average data with the FT-60, which severely limits your ability to use it with third party software (such as the excellent Sports Tracks). Want to do strength training AND capture cycling data? Nope - can't do it. No such model. Let alone put all of that into your Star Fitness Program. Even if you wanted to spend a fortune and get their top of the line model (no idea which that would be), you won't get it all, and it probably won't work well anyway. One of their newest models, the very expensive RCX-5, gets generally good reviews and has a lot of features (but not the Star Program, that's only available on a few middle of the line models!), but if you read the forums you'll see people are complaining a lot about it too. You can manually set HR zones, but if you use the Fitness Programs from PPT, they reset your HR zones wiping out your customizations.
The Polar line is rife with interesting technologies such as OwnIndex, OwnZone, OwnCal, Fitness tests, Star Program, Sports Zones, Sport switching, etc. The way these are distributed among the models defies understanding. As do all the features of their HRMs, which are very poorly documented. Many people like the Star Fitness program. PPT lets you monitor it. But it's only supported by a few models. If you get a second HRM to use when you cycle (since you can't get cycling accessories for the FT-60), you won't be able to combine your data from cycling with the data from the FT-60, to use in the Star Program. So much for cross-training or a balanced fitness program. This makes no sense; the data can be captured on the website, the website has Star Program, but you can't use those data in the Star Program.
You'll also find that on PPT, although you can enter additional data manually (cadence, distance, etc), you won't be able to plot it graphically, or really do much of anything with it, even though the website has some very good features like that. (You CAN plot it if you're using the FT-80 though; in other words, what you can do with data you enter directly on the website, which was not captured by your HRM, depends on which HRM you have. Huh?). If you want to capture different kinds of data (for instance stroke rate for rowing or Power for any sport), there's no easy way to do so. You can enter it as Fitness Data (the same way body weight and glucose would be entered), but that makes no sense, is incredibly awkward to do, and isn't very useful.
The more you learn about the Polar line, the more frustrating it gets. PPT tracks things like Running Index, but you won't find a model which supports running index AND the Star Program. PPT has a variety of Fitness Programs you can generate, but if you even try to do that, you'll wipe out your Star Program data (and you won't get a warning), and there's no way to use both. It goes on and on like this. Oh yeah - some models (eg the FT-80) will let you export your data into HRM files which can be imported into other software. Not the FT-60. Good luck figuring out which are which. PPT has XML export but this is pretty much worthless as it's only summary data. And I haven't even mentioned integrating GPS data - I don't use that so I haven't taken on that issue.
It's frustrating because Polar could have a really great lineup with some really impressive features if there was someone in charge over there, rather than what appears to be a company run by anarchists. Polar would clearly excel if your goal is Fitness rather than training for competition or performance (where Garmin is clearly the winner), but they cripple themselves.
On top of all that, if you read reviews on all their models, reliability is as random as product features. I would have preferred the FT-80 over the FT-60, but if you read reviews you'll see that unlike the FT-60 which works well, the FT-80 has terrible reviews and many problems. Oh yeah - the FT-80 comes with data capture accessory (can't buy it without) but the FT-60 doesn't. If you had the FT-60 and bought the flow link, and later step up to the FT-80, you'll have to buy the Flow Link again.
If you can find one Polar model that a) has exactly the features you want, b) you don't think you'll ever need additional features or want to step up to a different model or track other sports, and c) you can find those features in a model that actually works well, you'll be in great shape. But before you purchase, you need to look at accessories available (and unlike Garmin, the Polar accessories are insanely expensive - footpod for the FT-60 is almost as expensive as the HRM itself), you need to look at how data are captured and whether it's into PPT or their standalone software package, which data are ACTUALLY captured, what PPT will let you do with them FOR THAT MODEL, etc. For the amount of research needed, you could probably get a Master's Degree.