I tried every rower I could find before buying one, and the Lifecore R100 is by far the best of the bunch. I only gave it 4 stars because there are little things that I think can and need to be improved, such as the screen tends to lower itself gradually when working out, to the point where you need to let go of the handle bar and raise it, yea I am sure it just needs to be tightened up, but on a brand new machine, one should not have to do anything. I also think they could have made a longer, and beefier cord to plug this thing in, the little short cord is just not long enough.
The thing glides smooth, rows nice, and is a good rower. It goes together very easy, took me maybe 5 min to put together. I also spoke to the owner of Lifecore when researching these things, and the guy really knows a lot about rowing machines, and you can tell that he spent a lot of time refining this machine, and he cares about his product. Bottom line, good product, and this is defiantly on the top end of rowing machines.