I just picked up a Gen 4 22. I won't have a chance to fire it until tomorrow, but initial impressions are... I like it. The grip feels good to me in both the smallest and largest forms. Oddly, the middle size feels the worst in my hands and points the least naturally. I'll have to shoot a bit before I decide which form to leave it in. One thing I really like and hadn't thought would make a difference is the mag release. I can now press it without having to shift my grip at all. Nice.