Hello all just joined after lurking for many years. I just started dabbling in concentrates and decided I'd post up finally. Here is my first ever run of qwiso. I used 3.2g of product(supposed kush strain) and got back .7g of oil. I was pretty stoked to get that much back which worked out to somewhere around 16-17%!!! I've heard iso returns more than butane so take it for what it's worth. This is about half of what I made left 3 days later, stuff is potent!