haha they once thought i was a credit card fraud because i used my dads credit card and our first names are different OMG!!! it was a hell of a headache too and i had to take a picture of my passport and send it to them.
I payed for private whois and didn't get it, then was targeted by someone and harrassed for a couple weeks through the phone/email/mail until I took legal action. truly ridiculous.
Yeah, there are people out there that don't like them. Personally, I don't mind them, they have been ok for me so far.
they are quite cheap for some registrations, but the site is slow for me. I routinelyy pay more for domains so as to have less hassle
I haven't had any domain related probs yet (would never use their hosting), but I've heard too many bad things about them so I switched over to Namecheap.