We've used StargateInc.com for a few domains (to try them out) and yes, they are a little cheaper than the normal registerars, but definitely NOT WORTH the headache. The only thing that worked without giving us too many problems was registering the domains and if I'm not misstaking, that also did not work (gave error 404) when you had filled something out wrong and pressed submit from the 2nd page. Anyways, for 95% of our domains we've used OpenSRS (
www.000domains.com and
www.WebLaunching.net) and we have never had any problems with them, they've even helped us out with domains that were not even registered through them!