I have used them for years and never had a problem. However, they are slowly creeping their prices upward. .com is now a little over $13.00 and they just this year made domain proxy (hiding your contact info on whois) free.

I have been moving my stuff to porkbun.com. They are US based and $8.84 for a .com. Cloudflare is an interesting offering, although as of right now, it's not actually launched and it appears that you are required to be routing all your traffic through cloudflare to be able to use their registrar service. I don't know if that is a permanent requirement or just for now though.