Yeh I trained at a gym that used the Bas Rutten MMA fighting system. I live in London, Ontario and Shawn Tompkins is the instructor their at a gym called Hardknocks.
I find that the kickboxing is second to none. The gym has produced many champion kickboxers. The grappling though leaves much to be desired. Check out www.sherdog.com
and look for fighters Mark hominick and Sam Stout to see their MMA stats and such.
Check out the teamtompkins website as well... www.teamtompkins.com
I hope I helped.