I bought these because the chamois pad in my Zoic liners just weren't cutting it as I increased my miles on the mtb. I figured even if these were made for racing, Fox would still do a better job at a mtb chamois. So far I've been impressed. The padding isn't bulky or even noticeable and I haven't experienced hot spots during longer spells in the saddle. Haven't crashed with them (yet) so I can't speak to how protective they are, but they seem like they'll be ready. Good luck fitting them in a drawer though, they don't fold due to the padding.
The chamois is oddly large in the front but I forget about after a couple of minutes. The shorts are comfortable and fit under my MTB shorts without issues. I like the extra protection they provide without a lot of bulk. Temperature wise they are comfortable as well.