Haven't seen any reviews, but I got mine (regular & jumbo sized) yesterday & I think they're great. I like them best on my MF, but they work almost as well on my regular auto batts. The draw is maybe a tiny bit airier with my regular autos than on the MF, but still no primer puff needed, and more vapor than I've seen with the vertical coil cartos. They make using an auto fun again - I had set them aside in favor of manuals for a while but this combo is fantastic. I'm using 60/40 VG/PG with no issues thus far. I like them way more than the verticals that I was using.