ReAction figures are basically what-if-Kenner-made-this-figure-in-the-'70s-or-'80s, so they're not exactly supposed to be masterpieces.
My regular T-800 has floppy legs (chrome version is fine) and the Rocketeer's helmet doesn't stay on at certain angles, but it doesn't bother me much.
Basically your main difficulty is getting them to stand (as you would Kenner figures of the past).
Which reminds me, I need to get that Rocketeer POP!
EDIT EDIT: Oh yeah, information. I'm working on that.
I have all the Ninja Turtles (Raph, Leo, Donny, Mikey, Splinter, Shredder, April, Foot Soldier, Bebop, Rocksteady), Ghostbustes (Peter, Ray, Egon, Slimer, Stay Puft, Winston in Ecto-1 is on order), Batman, Joker, Batman New 52, Batman 66, Joker 66, Dark Knight Batman, Dark Knight Joker.