The Achilles IIC is the British version of the M10 tank destroyer (TD). It was based on the M4 Sherman chassis and mounted the 17 pounder anti-tank gun.
The kit is molded in a medium green styrene with some minor flash and a few sink marks, though nothing that isn’t easily removed or fixed. If I counted correctly, the kit contains 339 parts. Yes, 339. In 1/72 scale. The good news is that a lot of the parts are for the tracks, not all parts are used, and there are some useful parts left over to detail other kits. The attachment points are a bit larger than some other manufactures, but can be cleaned up with a bit of work. The tracks are link-and-length. I did a bit of research and found that some earlier UM Sherman kits had incorrect road wheels (six spokes instead of five) and the track was too narrow. It seems they fixed the road wheels, but apparently didn’t fix the track. I don’t think it’s too narrow by very much, though.