Domain names or hosting package?
I'm not sure about domain names as I get most of mine through PairNic but I had their hosting for a mainstream venture and other than the painfully slow loading pages, they were decent. Their CPanel is standard for most hosting companies. It's more for the newbie though.
So domain name purchasing I'm not too sure about but their hosting is good if you have a basic site but the server response and page loads are HORRIBLY SLOW!!!
There's my 2 cents and I hope it helps. Buy your domains from a company that has a reputation, a good reputation so you don't have to make threads like this here.
Oh, and if you decide to host an adult domain on Ipowerweb then good luck! They are pretty stern when it comes to that. I had a picture of Jessica Simpson's nipple slip and received a "warning email" for derogatory content. It was only the areloi...not the nipple!!!