I guess in this case, at least you do know what to expect from MS. Other PH's who are less known would take more research I suppose. I've been burned on other hunts in the USA from not knowing enough about the guide. Of course that was in the pre internet days, which for me is pre 2008. haha!
In the end, I just want an exciting, successful hunt. And the idea of being able to take two buffalo in Tanzania VS only one buffalo elsewhere, makes me want to hunt there. And Mark seems to be the best thing going there.