We have four tire chains that I'm aware of in my neck of the woods.
One of them ripped me off once and tried to again years ago. I wrote them off for good.
Another one, Tirerama, has been providing excellent service to us for several years now, including free replacement of vandalized tires.
Discount Tire seems to offer the best tire price, but I can't get a reliable tire balance from either locale, and they don't answer their phones, and they schedule you so far out that I consider it to be totally unreasonable.
LS has been well covered in this thread, and I now agree with most of what is said. But I will say they can balance tires that nobody else has been able to, and they provide probably the most immediate service available, and they don't hesitate to work overtime to get you taken care of.