Following on from the
previous thread, I find polar alignment pretty simple for wide angle and/or very short exposure work.
Accurate PA has been a bit fiddly for me so far - probably because I'm used to how sturdy and precise the EQ6 is by comparison.
I do have the polar scope, but haven't been terribly impressed with it - I don't bother with the EQ6 scope either. I've always used PHD-assisted drift align though... the AT's polar scope seems to get rave reviews from some people.
Based on six full nights of use so far, I'd say the AT is excellent for wide angle shots and travel portability, but it's definitely no replacement for "proper" imaging on a GEM. Since there's no Dec axis, you'd have to dither the frames by hand (release the ball head, move the camera slightly-but-not-too-much, reattach, hope you haven't screwed up the PA, etc)... you might go nuts having to do it every 3-5 mins
I'd be very interested to hear what other AT users have to say.