LATCH installs tend to be better than seatbelt installs. As far as I know, Peg Perego is the only company that actually RECOMMENDS LATCH installs because belts are such a PITA. If you can get a decent seatbelt install (almost always doable, but usually not easy), the thing loosens if you blink at it. Seriously, I've had parents not release the seat all the way when they try to get the bucket out, and they wind up loosening the base mere minutes after we've installed it. I tend to do seatbelt installs since people usually don't have LATCH in the center, and as much as belts are a PITA with that seat, I still try to get it in the middle.
The puzzle buckle is awful, and I feel that the buckle doesn't release easily. I hate the handle rule and don't like the headwings (those particular wings, not wings in general).
There's something else I don't like about it, too, but I forget what.
For what that seat costs, I'd expect a lot more. Instead, it's more difficult to use and install than any other infant seat out there.