I agree with all that has been said so far, but for me the next most important thing next to training is customer service.
So you've shelled out your hard earned cash on fab training and then you start working from home alone. You come unstuck, you can't remember exactly what was said on the course and need some advice. Who do you turn to? Your training provider. You need to feel at ease with that Company, that they care, and that they know what they are talking about, and that they treat you as an individual. So I would say on this score, go with your gut insticts. Who stands out as the most professional and the one that treats you as an individual when you make enquiries.
However, I can say from experience that Creative hit all the right buttons for me.