Do you go to a salon and have it professionally done or do you buy over the counter products? If you buy over the counter what is the best and how natural does it look?
Should I have it done at a salon??

Thanks

It really depends on many factors.
are you totally grey or just with streaks of grey?
do you want to highlight your hair or cover it up fully?
do you want to go darker or lighter than your hair now?
Basically, if it was me I would always go to a salon but alot of people feel comfortable doing it on their own, especially if it's an all over dark colour, as that is harder to mess up then highlights, for example.