I have used it a lot, The kit is good for beginners to get the hang of it. Not much material to work with. Makes tiny parts at best. For molding I use the pink molding material. Hi strength molding for undercuts. I keep the resin in the frig till use, it gives a little more working time. Maybe two minutes more. You have to mix it well, which takes time.
I am also in the market for larger quanitys and longer pot time. Just don't want to be buying gallons or drums. Hope this helps.