Quality varies greatly between different types of bootlegs. The regular Stormtrooper or the Spiderman bootlegs I got were basically just like the official release except some paint flaws and some nitpicky differences, but the joints are solid and functional. The Royal Guard bootleg I got was a huge piece of crap whose leg just snapped off and the joints were mostly loose.
That said, everything can be fixed. I usually put a dab of super glue into the joint and then wait a few seconds, then move the joint a bit, wait some more, move it again, rinse and repeat until the joint is working fine. It takes a little practice, but it really works to fix the loose joints. And if you accidently overdo it well you now have a statue! [emoji38]
The paint defects and changes don't bother me because I only get bootlegs to work on customs and repaints, so I usually cover whatever work was done by the bootleg company.
I just grabbed a third Stormtrooper, a Sandtrooper, a Drummer/Flagbearer, a Boba Fett and a Royal Guard bootlegs for upcoming customs or army-building, and I'll let you know how I find them when they get here.
The second Stormtrooper I got was used for a Death Trooper custom, the third will be for Captain Phasma.. The Sandtrooper is for army building since I already have the regular sergeant and the SDCC corporal but I wanted another one to use the white pauldron. Drummer/Flagbearer is going to be used for parts to mix and match with Boba Fett to work on a Dengar custom and potentially an accessory for upcoming Jango Fett and white Boba Fett, and the Royal Guard will be used for a Senate Guard custom.
I'll post pictures as I finish working on these