Had a few friends rave about them, but they aren't growers or knowers so...
They look alright, I think they make some claims they cant possibly back up though.
Like knowing exactly what each strains requirements are feed wise , which would require a lot of people to be using them and inputting the data into the database for the collective.
Plus some other stuff I thought impossible but don't remember.
Bit of a gimmick from a growers perspective. I imagine they would look good in some Hollywood dressing room or directors office.