I've grown ISP's Chem d bx3, 91 bx, and IC91. I say ignore the haters, I can tell you from experience, ISP's gear is solid. On Canna Zon, their was some drama when a guy questioned how valid ISP's breeding cuts were. Ohso fired back and told the story of how AJ, one of Chemdog's inner circle, sold Chem 91 cuts in 93 (four cuts for $ 20K) to some mob guys, he worked for, so they could run it commercial down in FLA.
I had an uncle get busted growing Chem 91, a few years after that, he described the biker that brought it, and said the guy's nickname was " Salt ". On Breed bay there are a couple posts where Ohso says he used to go by Salt, when he was a smuggler. Those posts were years ago, before all this drama started.
A lot of the info lines up, between Breed bay, Ic mag, Canna Zon and other spots, but you have to piece it together. After reading the 91'chemdog thread on Ic mag all the way through, twice, it seems pretty obvious to me, the guys that keep attacking everyone else over chem genetics always seem to want to discredit the other guy. That way they can claim to have the only real deal cuts.
On Thc farmer some guy claims Ohso traded him some seeds, and Ohso renamed his Chem 4 bx, Chem D bx3. I doubt it, because other folks have posted that Ohso sent them Chem d bx3's seeds years before that trade ever took place.
Then Chronic Culture pops up on Thc farmer using ISP's Chem d bx3 in some of his crosses, but says it's he believes the other guy. But I heard he just went along with that guy so he could sell beans on Thc farmer, after fleeing Breed bay, leaving a bunch of people screwed with bogus fem'd beans he'd made and sold there as Charrmoro seeds or something like that. On Breed bay Chronic Culture went by westcoast547 and ommpkid , and he praised Ohso, but bashes him on Thc farmer a few years later ??
My Uncle Mike says ISP's Chem d bx3 is dead on for the Chem D he paid $ 600 to $ 700 a oz for in NY back in 2005. So, I'm of the opinion, it's best to ignore all the bullshit attacks and claims, and just get what you want, grow it, and let others know if it's worthy.
Honestly, how long does any cut stay exclusive ? Share it once, and it will spread like wildfire. I grew GH's Chemdog after it first came out, it was just ok, and not anywhere as good as ISP's for ease of growth, yield, or potency. So, I don't recommend GH's version. I also grew Green Beanz's Chem DD, it was very good like ISP's. I can't ever find TopDawg's and when I do, I'm usually broke. TopDawg charges too much for his seeds IMHO.