Where to buy good weed in Amsterdam?

A friend of mine is moving to Amsterdam and though he has been there as a tourist and taken drugs which are legal there, he has never had a long term stay.

So my question is to those who live in Amsterdam and have experience with this, can you recommend good places (shops, cafes, personal favourites or general areas) where he might be able to procure good weed and not at the ’tourist’ prices.

There are also many types of weed so if you have any recommendations on types please feel free to state which you find to be good and why.

Please do not flood with personal opinions of whether weed is good/bad as this is not a discussion about weed but a question about where to purchase good weed in a place where it is legal.