Liquid Diamonds is kind of pricey. $25 for a 12oz kit on Amazon. Is it worth the price?
Yeah, it is a bit pricy...and I guess that just kind of has to be a judgement call. I did pick up a pressure pot, as I wanted to start getting into custom pen blanks, which I've recently purchased some molds and label-rapping jigs for Sierra pen kits. So with that, the Liquid Diamonds would not be essential.
Before the pressure tank, it was the only resin (and note that its an epoxy, rather than a urethane like Alumilite, so it hardens differently and turns a little bit differently) that would cure bubble-free. I actually originally used it to fill in voids and such in turned bowls, and for that purpose it actually is still a really nice solution. Expensive, yes, but when you need to fill in voids with say mica-powder resins and want them to be bubble free, the liquid diamonds is great. The alumilite and other resins always seem to bubble a lot, and I've never liked the little bubble cavities after I turn the resin down on a bowl.
If you get a pressure pot (I picked up the 5 gallon California Air Tools, which was $250...which as I now understand, is actually a very good price considering the more popular pots are often around $400+), then the bubble-free nature of liquid diamonds loses its value, as any resin will do as long as you can get it in the pot in time. If you don't want to get a pressure pot, I think the liquid diamonds could be a valuable option. At some point, the total cost of liquid diamonds would reach and surpass the cost of a pressure pot, at least until the pot needs to be replaced.