Great place. I considered purchasing a 2010 CPO C300 there in August, 2012 -- one I'd found on the MB CPO website. Ray and Bill and the others at MB-Henderson were very helpful and responsive. Most importantly I think, they weren't pushy at all.
Ultimately I bought a CPO C300 at another local MB dealership, but the decision had nothing to do with the dealership. Ray et al at MB-Henderson Sales are outstanding, and I wholeheartedly recommend them.