I'll second this. They also give a free SSL certificate

For a couple of registrations, it doesn't really matter, but they usually have at least one "coupon" promotion running. A very typical one is for about 10% off a new registration. If you're making several registrations, googling "namecheap coupon" might be worth the effort.

EDIT: Also, if you want to pick up the free TLS/SSL certificate offered with a new registration, you need to click on the link during checkout. The link looks like one that just provides more information, but no, that's the link to add it to your purchase.

Note that after the first year, you'll have to pay for WhoIsGuard and certificate renewal (as well as the domain itself).