I have a bunch of these, but have been disappointed overall. They look fantastic! But the quality can be iffy.
My Toy Biz Icons had flimsy and/or warped joints.
Hasbro fixed the joints, but to the point where they would barely move. It was so bad with Daredevil, Nightcrawler and Colossus (and to a lesser extent, Phoenix) that I broke one Colossus and ended up returning the three of them (I kept Phoenix). I never opened Thor or Cyclops, so I don't know how their joints were. The Gigantic Battles have been a tad better, but I still need to use a paper towel and pliers to get the hips to swivel. A Gigantic Pain!
There is also an unmasked Wolverine (both of the Toy Biz Logans are Astonishing X-Men costume). the Hasbro Wolverine is a brown repaint of that figure in that same costume, which looks odd.
Masked Captain America was really hard to find! Unmasked seemed to be the regular version.
I forgot about Doom. I think I may have him MIP in the attic somewhere (which I will find when I do my attic cleanup and well past due toy purge).
BBTS has some of them listed HERE.