Awful - dangerous to deal with if you need a stable service!!!!!!
My wife ported her number over 2 weeks ago and as yet still has no service. Giffgaff cant explain why or when it will be fixed.
Customer service is based on agents (third parties) who have no accountability or interest in the service. The only communication we have had is along the lines of 'its been escalated, it is being looked at'.
If you need a stable service or issues resolved quickly, then this service is not for you!!!!
Read the Giffgaff forums before considering - most members are raging about lack of interest or communication when issues arise. They are not yet geared up to deal with professional workers.