I use 1800contacts. As long as you have your prescription from your doctor, you shouldnt have a problem.
I used to use the regular contacts and when 1 ripped, my contact doctor(I have a regular opthamolagist too) told me I had to wait 3 weeks for an appointment. No way was I wearing glasses for 3 weeks! I then went to Lenscrafters, got an exam and they ordered me the disposable ones. Ever since, Ive been reordering through 1800, and have had no problems. This was over 3 years ago.
My only complaint is that I have gotten a few contacts (maybe 4 over the past 3 years) that are a little ripped on the edges. My guess is that is the contact company's fault and not 1800. Ive never tried to get replacements because I figure its not worth the aggravation, so I cant tell you how they would handle that. But otherwise, I always get them delivered very promptly and exactly what Ive ordered.