I buy all of my film from B&H because of the extreme cost savings as well as a bunch of other supplies and things. Never, ever have had a problem with B&H that wasn't solved quickly and completely. It has always been a class-act in my book. Yes, you do get the NYC gruffness, but I get over it pretty quickly. I've also purchased digital cameras from Adorama and Cameta with exceptional customer service.
For darkroom supplies, I buy everything I can from Photographer's Formulary. Folks, it doesn't get any better than this.
But, for the first time I've ordered something from Freestyle. I'm actually a little upset--I'm upset that their prices on film aren't more competitive with B&H. I'm so pleased with the entire experience that I'd be tempted to do all of my shopping through them. This is not to say that B&H is bad--far from it, but what I'm saying is that Freestyle somehow elevated the experience into something beyond what I ever expected to see in this industry.
Calumet, on the other hand... I'd rather deal with my cellphone company. They deliver the goods, but I think I'll stop saying anything more other than I ONLY buy from them only what I must--nothing more.
The point is, that buying is an experience with all of these companies. Each one sells and ships everything just as I'd expect and hope. But the interaction on the phone, the on-line ordering systems, even the customer-service calls are different. Of all of the above mentioned companies, really only one do I feel the need to go wash after a call.
Ken