I'm just curious what people think about the tech courses through SDI. I've talked to one guy that did nothing but bad-mouth it, because PADI has the best Tec courses, yada, yada. Anyway, i've looked at NAUI's web, and PADI,and TDI's, and they all seem kinda the same. The one difference i've noticed is that TDI's Seems to be a bit more minimalist, instead of having 30 different courses they put some of them in one class. Thanks.