Like the title says, why are Mephisto Genetics so desired? In the next few days I will be hoping to get some beans, and want to know whats the deal with them.
I've grown about a dozen of their strains, the short answer is that they have been potent, productive, often smell and taste great, and are usually very resinous (great for pressing). For autos, they are very impressive.
When I first started growing autos outdoors several years ago, I sampled a strain or two from a bunch of breeders (Sweet Seeds, Barney's Farms, Fast Buds, and Mephisto). At the time, from the strains I ran in that grow, nothing compared to the Mephisto, so for the two subsequent years all I grew were Mephs.
This summer I grabbed a bunch of different strains from different breeders. Weather-wise, it was a rough summer, so far two of three Dutch Passion strains had such intensely dense buds that they got bud rot. One Mephisto (Mango Smile) is one of the stars of the summer, the other (HubbaBubbaHaze) may or may not finish well. RocBud (Purple Scoops) is the frostiest of them all, Ethos (Pluto's Cut) and Twenty20 Mendocino (Triks) are very respectable plants with no issues and good structure, not as big producers as some of the others, but given that it looks like they will finish without issues that says a lot.
I'm months away from a well cured smoke report, so far all I can comment on his how hardy, productive, and good smelling they are.
It's an outdoor grow so there are seasonal variables, and I grew one sample of each, so this is not a definitive breeder comparison, it's just my experience that I'm very slowly accumulating. I hope to have Mephisto strains in every grow that I do, but I no longer feel that they are the only breeder worth growing.