Did my first renewal with GoDaddy this month and a couple days after renewing, discovered my nameservers had been reset to nothing. I only have one domain registered with them, so I don't know if it was a glitch, a fluke, or what...but it left a bad taste in my mouth.
That said, ANYTHING is better than NetSol....
Been happy with SpeedyDomainRegistration, but haven't had to do a renewal yet....fingers crossed...
Mishi