I have also been using NameCheap for many years. They are a little more expensive than other registrar's ($9.69) and are actually just a reseller of eNom, but they do a great job.

I've never had any issues and their customer service has always been very quick, helpful and friendly.

I also like how they keep their checkout system clean and consistent--I just want to order domains, not buy web hosting, email forwarding, domain parking, etc... (GoDaddy I'm looking your direction).