I bought Blackberry Moon rock at 9bht/g, as strong as anything I've had, but not much smell or taste. At the moment I'm mixing it with some older weed to reduce the strength a bit.
Can't say what the 4bht and 7bht is like as I already have about 6 months supply in hand now, can't smoke more than 0.5g a day. I expect they'll be sold out within a day or two, so order now if you want to try it.