I think this is a pretty good file set. You get a lot of pieces for the price, and they look good.
There are a couple of minor flaws. On the "cave" style ribs, the angle of overhang where the ribs meet the spinal column is a little too much and ends up printing kind of ugly. It's acceptable and probably won't be seen, but I think it could be adjusted by either making the underside of the spine concave a bit, or moving the rib spine joint closer together. A similar overhang issue occurs on the "decayed" ribs. The smallest neck doesn't really match up with the size of the vertebra in the skull. Lastly, the file name system is a bit wonky. The set 01 has files that say body01 and body01 mirrored, and body02 and body02 mirrored. Except the X and X mirrored are actually two different pieces and not mirrored. In addition, only pieces 01 and 02, which are actually the same smaller piece, are actually mirrored. 01 mirrored and 02 mirrored are the same piece, but merely rotated and not mirrored. The set 01 kind of relies on the large piece being mirrored to line up correctly.
For the set 02 and 03, if you wanted to make a symmetrical ribcage, you would have to print double of the small body01 and body04 pieces, but then mirror body 02 and 03 and print them again. Not a big deal, but kind of a headache.