I agree completely, I wanted to try it before i bought some.
Usually I dont trust the lounge employees here with anything other than starbuzz, in fact they usually dont serve Nakhla to people (except for my fav. spot).
I do know the owner of one particular establishment I always go to though and he and I usually make our own hookah and sit and talk. It's just him and his brother (both Iranian), other lounges in town are staffed by college kids who couldnt care less, it's sad.
I'll def. read up on prep and give it a go.