Very good.
The adult Optimus Prime comes in 2 sizes and I got the large (not xlarge). Despite me being shorter than average I found the width of suit fine and the height too long in legs and arms (which was expected); put another way, it would better fit a average hight male person with narrow-ish build. The mask looks good and fits well but has a bit of hard foam for the bridge of your nose that makes it unconfortable (i.e. suggest replace with something more sponge-ish) but the big problem is that it has fairly restrictive field of view so you can see anything above, below or to the side. I stopped wearing the mask after almost knocking over someone I couldn't see was beside me. It has a couple of velcro tabs to fasten the back which (as expected) is very plain with no design i.e. it would be nice to have something printed on back but no big deal. The design on the front is good. The fabric is very strectchy and survived a lot of tugging and hitting (it is padded) and general abuse. Overall it is very good with only a few niggling issues that don't detract overall. I'm happy with the purchase and with the fast processing and delivery.