I don't believe I talked with Mitch, specifically, but I did purchase animals from Global Captive Breeders at the 2010 San Mateo show.
The staff were helpful, well informed, and put up with a ton of questions and popped at least a dozen Kenyans for me until I found the gender/genetic combination I wanted. (These were my first snakes, as until now I've been a gecko-only kind of girl, and they were quite tolerant of my first-time-snake-owner-ness.)
I bought a pair of '09 Kenyan Sand Boas, a visual Anery female and a het normal male. (Of course, the 'het' won't be proven for a couple of years, but they were up front with their records and litter information, so I have no reason to doubt the genetics at this point.)
I was told both had been raised on live pinks and were reliable eaters, and this has been the case. The female will still only take live pinks, and is a bit "shy" about eating, but well within completely normal bounds for the species. The male, though, is a CHAMP and took to frozen/thawed pinks the first time I offered them to him and hasn't looked back. I was expecting a fight transitioning from live to f/t, but he's been so easy about it.
Both youngsters are eating well, growing, shedding, and generally being great, worry-free, healthy little snakes. I'd absolutely buy from them again.