I found the frequency response to be very neutral in the mids and highs. The bass end gets tailored to your room with the calibration system it has. The imaging is great assuming you have a room treated for minimizing reflections. The entire spectrum is smooth, and a lot less fatiguing than other monitors i've tried. The dynamics do seem to be fine, the transients are well represented. They really do sound great.
I've had this pair of monitors for about 9 months. I love the room tuning feature, as I do a fair amount of on location recording, so it's nice to be able to get a better bass response anywhere I go. Also the lit SPL meters on the front are very attractive and great for impressing clients! I did find with the room tuning feature, it comes back a little different each time you run the test. So I recommend running it a bunch of times and taking an average. Also, they are surprisingly large and heavy - so make sure you have space and strong stands/shelves. I've heard a bunch of different monitors - and while these don't stack up to your custom Genelecs or anything, for the price range I feel they can't be beat. I would definitely buy them again knowing what I do about them now. Great buy!