Went to pick up Corroder and Thunder tonight - and, of course, they didn't have them. But they did have Xplode and Meltdown, both of whom I happily took home instead. These two sets have blown me away. There literally is not one negative I can think of for either of them - well, except for the decals, of course. Oh, and those floppy leg armor pieces, but to be honest I don't really mind them here. But overall, they're both excellent sets, and I fully recommend them.