I've experienced my registrar's DNS servers going flaky or downright not working for a full working week. It's fine to rely on them for a project that hasn't go

I've experienced my registrar's DNS servers going flaky or downright not working for a full working week. It's fine to rely on them for a project that hasn't gone big, but once you're making decent money, I'd really advise spending the $howmanydollars/year insurance on a proper DNS service.