The first 6 months, I bought pre mixed or had someone mix for me. Now, I only use DIY, since I pretty much only vape a weird flavor not really offered by vendors, and am slowly stepping down the nic level. I vape blackberry champagne (PA blackberry, lorann's champagne both at 10%, 70/30 pg/vg at 10 mg/ml) I can't find that combo at any of the current vendors. Velvet Vapors came the closest, and I would buy from her again in a minute if I needed to.