Yeah sensi is a quality seedbank, they don't ship directly to the US though which may be why you don't hear as much about them on here.
I'm growing sensi jack flash at the moment, they say 70 days for the sativa pheno but it's looking more like 80 or so to me.
The plant looks awesome so far though, nice long buds with extremely good resin production, smells absolutely divine
I'd be slightly wary of their femmed strains though, not heard many complaints but i have read a few reports of males popping up in some of their fem strains (i got 2 males in my pack of JF#5 and i've read someone else having the same issue with fem earky skunk)