I just got my HiPro in yesterday. I've only typed on it for about 15 min so far. This is a very unique keyboard. Initial impressions of the HiPro are mixed for the moment. But i'ts growing on me fast. One thing in particular that I love about this keyboard is the way the number row catches your finger. I tend to fat finger the "underscore" in particular and often get "+" to go with it. The upward curvature and more narrow key target have solved that problem right away. I also love the way the backspace catches your pinky. Also, the scoops. this has no nipples on the F and J, but rather very exadurated scoops on "S, D, F" and "J, K, L". It really just grabs your hands and forces them to the home row. I have never had trouble with this in the past, but this really will make sure that their is no issue. My only complaint at the moment is that it's a little louder than I would have liked. My neighbors at work are sooooooo picky about noise at work. I'm sure they would complain about it. Heck, they even complain when I get going fast on a rubber dome.
I'll likely post a review comparing the HiPro, to 87U (silenced), and 87U 55g later.