I got this because I absolutely detest the chest strap of an HRM. I already HAVE a chest strap in the form of a bra, and the double strap was a real buzz-kill. Plus since there isn't a transmitter involved I don't have to worry about the signal from other devices or substations or whatever interfering with the HRM (my old Polar had a tendency to skyrocket the pulse when I passed a power substation on my route).
The ePulse2 is a much more comfortable solution, and while all the velcro is a pain in the winter when you have to constantly pull your sleeve(s) over it to check it, when wearing short sleeves it's great. A bit worried about the oddly-placed tan-line that I'm sure to develop, but perhaps I can switch arms and positions on the arm to combat that.
Speaking of positions---I get good readings no matter where I put it on my lower arm, even my wrist. That is even better than I had hoped for, so kudos.
This HRM seems fairly accurate, although there are times on hikes when I don't feel that it's registering correctly (climbing a hill, obvious increase in effort, and it registers a mere 90-something instead of the near double HR that it FEELS like both with the effort and a pulse check using my fingers). However, MOST of the time it seems pretty close. I've double checked it at rest with the HRM on my blood pressure cuff, and also using the count message, and it seems correct at those times.
The battery life IS an issue, and I lost one workout before figuring out that I would HAVE to use demand mode for my longer bike rides or risk losing my data. It's a bit of a problem when I want to keep an eye on my HR on the bike, because instead of just glancing down to check it, I have to take a hand off the handlebar and eyes off the road long enough to mash a button to see it. I will take the suggestion of the one reviewer and try changing out the battery with the Energizer Lithium---if that works, then I could leave it running in Continuous mode on the longer (3+ hour) rides, thereby solving that particular problem. In the meantime I follow the advice in the instructions and leave it on the charger in between uses so at least it's always got a full charge.
One thing I would have liked to have seen on this: Time in zone. It has the zones defined, and even allows you to define your own zone, but doesn't tell you how long you spent in those zones, or even simply an alarm to tell you when you have gotten out of a target zone. Without a time in zone feature there doesn't seem to be MUCH point to having the zones except for informational purposes, especially if you can't constantly check to see if the "heart" is blinking when you are displaying the zone.
All in all this is the best HRM I have used. Granted, my experience with HRMs is not vast; but the fact that the ePulse2 is a continuous HRM without a chest strap means that my experience with the chest strap versions is not likely to ever be broadened.