I've never used them. They're probably alright. Looks like they're specializing in engraved spools more than anything. My guess is that they're buying ribbon in bulk from Baco or Fine Line and passing along the cost and adding some additional profit.

Here's typical bulk pricing:

nylon ribbon $0.10 - $0.15/yard silk ribobn $0.33 to $0.40/yard cotton ribbon $0.25/yard If you can get a spool's worth of nylon ribbon (16 yards) for about $1.50 to $3, do you really want to pay $8 or more plus shipping? If I'm going to do this (usually for small quantities of custom colored ribbon), I'm going to buy it from a local shop to help support them and keep them open.

There are obviously lots of options you can choose from, ultimately you'll do what works best/quickest/cheapest for you.