It's all up to you in the end, Ernie. Personally, I mix my own Pyrocat HD. I'm careful, wear a mast when I mix it, have decent ventilation, and I've never had a problem. There really isn't much to it. If you're still not comfortable there's plenty of pre-mixed developers out there and they are all capable of producing excellent results. Good luck whatever you decide. All the best. Shawn