as far as I know it's a clone-only(I know it as just s5 though, not s5 haze), that's pretty much like amnesia.
I don't remember if I've ever had pure s5, but one time a coffeeshop I used to visit often had s5 x amnesia, only 5 euro/gram but it ranks among the best weed I've ever smoked. unfortunately, it was sold out within one afternoon, and I never saw it on the menu again. I suspect it was grown in a greenhouse, since it was among the outdoorweed on the menu, had an outdoor-price, but it wasn't outdoor harvest season, and it looked like indoor.
I think the name is based on the s5-classification for mandatory military service, but could just be random. anyway, when we used to have mandatory military service in the netherlands, you could be disqualified/rejected from service on the basis of 's5' which meant you weren't mentally right for the military. ofcourse plenty of people who simply didn't want to go into the military tried to get rejected that way by acting weird, not sleeping for a while before check-in, etc. I know this just from stories, I'm too young to have experienced mandatory military service(nowadays you just get a letter when you turn 18, but you don't have to report in), but if it was still in place and I wouldn't be disqualified on physical grounds, I definitely would've tried it too.