Frankly, I'm very skeptical, for a couple reasons:
I, too, have doubts about ordering a suit online. Having thought it over, I found a local tailor (in Ann Arbor, MI) who will make a suit for me. He took dozens of measurements; he spent nearly two hours with me. I had the opportunity to look over cloth samples from several books. In the end, I was able to design a unique suit--one that will truly fit me. (Single breasted, two button, natural shoulder, ticket pocket, vest, dark navy blue with gray chalk pinstripe, side vents) In about two months, it will be finished, and the tailor, a person who really knows and loves his craft, will be able to do an exact final fitting. The cost will be nearly $1,200, but I'm sure it will be worth it. Having the services of an expert tailor makes all the difference.