Pretty happy with the Move in some ways, pretty disappointed in others. I only played demos from PSN so far (no disc-based content yet) but I've had mixed feelings about it.
The demos I played were EyePet, Racquet Games, Tumble, and RUSE. As for how they played...
EyePet--Not a game I'd seriously consider, based on the content of the game. However the demo worked reasonably well, even though I didn't follow the instructions and set the room up properly, etc. I was still able to perform 95% of what I intended, though there were occasional "how am I supposed to hold this?" moments, which weren't technical limitations at all, but probably due to it being midnight after a really long traffic-filled drive home...
Racquet Games--My experience was God-awful. Note that, as recommended by another GAF, I'm not writing it off yet. I'm chalking it up to not spending the time setting up my playing space very much. I hope he was right, but my initial experience (only played tennis) was that it was worse than Wii Sports Tennis. The swing lagged more, and often a swing would not properly correlate to direction. (i.e. swinging to the left would not send the ball to the left, sometimes) And I do, in fact, play tennis in real life, so clearly the performance wasn't right. I'll post back again when I spend a bit more time with it, but so far I'm pretty disappointed.
Tumble--By far my best Move experience yet. I really appreciated the technology here, because while TECHNICALLY a Wii remote CAN do the things that are done in Tumble, it most definitely does not have the same level of precision that the Move does. I was a Wii owner for 2 years, and am a computer engineer (btw, apparently Sony censors "engin" in "*****eer"...wtf?) so I understand the technology pretty well, and from what I've seen from both systems, this definitely shows the Move's technology very well, though a casual user might not immediately see the difference. Still, I'm very much considering purchasing the full game at this point--it's just a matter of whether or not I'm willing to put up with the tedious frustration that comes into play with this type of game.
RUSE--The only "hardcore" game of the group, RUSE definitely showed a lot of potential, as well. I had trouble syncing my Nav controller, so I was playing gimped for a while. (Hadn't charged my DS, either) After charging the DS, I started to understand what I was doing a bit more. I have to say, this game made me realize that the X,[],O,Triangle buttons are a bit confusing since they're in a square formation rather than diamond. But I got the hang of it eventually. RUSE definitely had some positive points, and on a technical level I was very happy with it. But I also found that the interface and controls (ASIDE FROM the Move's motion controls) were clunky and caused interruptions in the action enough to distract me from the quality use of the Move controller. For instance, you can select your units, then assign them an action, but they are automatically deselected after the action so you can't modify it without REselecting them. From being a PC RTS guy, I expect my selections to remain after I click something, and this threw me for a huge loop. I'm sure there was a good intention after playtesting, etc., but I just found it was too much unlike my normal experience to feel natural controlling with the Move. It would take a lot of getting used to, in my opinion. If RUSE wasn't a clunky game in general, I think the Move could really shine. It shows a lot of potential, but has a few shortcomings that I'm not too happy with at this point. (I might try it with just a DualShock, to see how the gameplay compares. Because my guess so far is that the Move adds a lot to the experience, but Move alone can only add so much)
Anyway, that's my initial reaction. I'm really happy I picked it up, overall, but as I've pretty much said already, it seems that (much like the early Wii days) the software is going to be the limiting factor here. I think it has a lot of technological potential, but the software needs to showcase it better. Sports Champions (which I played in a Sony Style store) seems like the best bet so far, but Tumble is definitely my second favorite. EyePet is also a good showing, but it just doesn't interest me as a game to buy. Hope this helps some of you who are on the fence at this point...