This is a great sharkticon! Bot mode is meh okay. The spinning arm gimmick is unnecessary but doesn't really affect the rest of the figure.
A couple of choices I'm not keen on are the lack of movable sharkticon arms and no elbows on bot mode.
Sadly the legs need to lock to stand in bot mode, that's a bit rouch since it really limits what you can do with this, but it's to build a pit anyway so it's not terrible.
If you get them for a good price, definitely worth grabbing a few.