They're a huge company, I use them all the time to reserve web domains, and I have used them for hosting, but I've never had them design a website for me.
They probably host hundreds of thousands if not millions of websites.
One thing about them, their customer support is freaking fantastic, and always instant, I've never been on hold with them. In fact, they often call me to check in and make sure things are working, or that problems we've solved haven't popped back up.