I do really like using it however I had to knock a star ...
I bought Rezblock to use in my oil rigs. I do really like using it however I had to knock a star off because if you don't change the water religiously (at least every 2-3 days) then you get mold built up in the water. I was smoking with moldy water for god knows how long until I discovered that. I was a little skeptical to keep using it but anytime I clean my rig and change the water using Rezblock it just dumps the oil out with the water. No more swishing alcohol or other solvents/cleaners in there to get it clean.
Rating: 4 stars