Got my HD7, gotta say so far... very cool, nice and smooth, awesome display. havnt had any kind of errors or faults, no pink lens camera issues as has been discussed in other forums, very cool for Internet and email etc...
Didnt think there would be as many apps as there are either which is a plus
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I've used a display version and i have gotta say, it's a pretty good start for a first version of the phone's OS, although not as mature as iOS or Android, but give it a few months and by mid 2011 you'll have a pretty stable OS with all the latest features in my opinion!