The customer service was great! I had to switch registrars because of some issues that were not resolved when switching companies from another provider who sold me my previous domains (not due diligence). They immediately transferred all subdomains off their servers so it's smooth sailing now for new registrations but if you have existing ones they might try again in 6 months or something like this? It took them longer than expected which caused problems after we switched providers as well since our old hoster didn't support renewals anymore once transfers are complete etc., everything worked out fine though - no complaints there at least :).