The problem I have with companies like AMS and GYO, etc, is they take a poplar name and change the parents from the original strain but keep the name. How is their Rainbow Kush a mix between Master Kush and Hindu Kush  going to be anything like the Dancehall x Blueberry cross  from Dutch Seeds also called Rainbow Kush? That is why I stick with the original breeders and even they change parents periodically. I guess its a crap shoot no matter where you buy seeds. Most of the seed banks in the US seem to keep an inventory of name brands and ship in the original containers