Thus far, with only 3 auto strains in... Nirvana's Northern Light Auto is my personal fav! The genetics of the seeds are of high quality, phenotypes & results are very consistent. With little effort and in less than 90 days, I can get 2+oz per plant of rock hard, trichome encrusted, sweet, sweet buds... from the veg tent!
It is a true connoisseur strain when harvested/cured properly, and though not classified as a "medical" strain, I still find it does wonders on nerve & muscle pain where the NSAIDs fail.
I've just started 2 Northern Light x Big Bud seeds that are at week two from germinating under 260 watts of LED, can't wait to see what they can do.