While in the guitar I had it in I did not found the AM bridge to work (while it was an amazing PU, with that amount of mids in a LP it did not work as it could in at least a fender scale) I too really dug the AM neck. Currently I am giving it a run in my Ibby S with RY brige and IT middle. While it does not really match the other two PUs in terms of tone as it is too modern for them in my mind, it does again sound amazing.
A nice fluid, modern lead tone. Smooth yet cutting, full, etc. Really nothing like the brige AM but still fitting it in a complementing way.
While I have heard it do a lot different tones, the one I got out of it, more in the LP than in the Ibby, was a Awake Dream Theater tone. That early Petrucci get nailed with my amp setup, which admittadly is on the classic side. With a more modern amp than the Orange TT it really does modern leads wonderfully. Most people recommend the CS neck for that style, but in my mind the AM is a strong, strong contender and overlooked far too often.