You can't look at just the numbers. If I asked your best friend and some great aunt who hasn't seen you since you were 3 I might get a 50/50 poll on whether or not you wet the bed. I am certainly not questioning the statements that someone got a snake with mites from BHB. With an operation as large as his there is bound to be a snake or two that got out the door with mites at some point. Unless you have pictures or videos its hard to say how bad any case might be. Its also entirely possible that the errors that allowed those snakes to get out have been corrected. You then have to ask yourself if those bad reviews are relevant to your current decision. They may be, but you need to review the accounts one by one in context.