The magnets used for holsters seem to always come apart... I can see being bothered by it, but it's just part of the hobby.
So I got my set in today, and I'm in love. When just casually checking them out the Sideshow figure still looks pretty good next to the Hot Toys set, but when you pay a bit of attention there are a number of key improvements HT has made that really make them an excellent set. It feels like Hot Toys paid attention to what Sideshow didn't get right on their troopers and fixed all of the complaints.
They added the gloss to the armor, refined the helmet (especially the little microphone pieces), have a much better body (tight, well proportioned and seems very solid), got rid of the cankles and gave him a generously sized cod piece. If I had one minor nit on the figure it's that the ankles are a bit gappy, but they pose so well and you can easily address it by moving the armor around.
I love all the extra hands, the included mouse droid (goodbye Hasbro stand-in) and the weapons are really well done. And again they seemed to have found ways to improve upon the Sideshow ones weapons; not only do they look a bit cleaner, but the moving parts work better and they just feel more durable.
I really hope this set is a sign of things to come from Hot Toys and their Star Wars license, if every figure is this good I'll be one happy collector