There's 4 main phenotypes which you can read at ACE's site. The one I tested for them (listed in their strain description) was very manageable. It doesn't stretch much if at all and runs about 77 days from flip. It's very high in THC and it tends to creep so if you've never smoked it before you'll probably over indulge. If you wait until you feel it to stop smoking then you're going to get much higher than you expected. It delivers quite a punch and seasoned smokers love it for it's ability to cut through the highest tolerances. Everyone is affected differently by weed but most find this one kinda trippy (especially for inexperienced smokers). I gave a sample to a co-worker and he said it felt like his brain was melting and he got stuck staring in the mirror for like a half hour. I like to listen to music with headphones when I smoke it. I think it's one anyone interested in a real sativa effect should try this one. I personally like the sativas with more thai in them but that's just me. The Thai strains are much more friendly. The Killer can make you deal with things mentally that maybe you don't want to so I wouldn't smoke it if something is bothering you. Overall it's a first class sativa and you won't find many like the killer Haze.