We have FMS2 on our 319's but not 320 and 321's and I really like it, a few more finger presses to get some things done but a bigger LCD screen and a lot of usefull stuff make it a big improvement on the old one. Airbus say that almost all of the problems (ILS/DME, abeam waypoint problems, no waypoint mod. once in LOC mode etc, etc.) will be sorted in the next software update and it will then be almost as good as the one I used on the 737!.