Well the solenoid and reg work great but the needle valve with the bubble counter on it is a piece. The needle valve is very inconsistent and hard to finely adjust, so other than that its great. As far as cost goes, its $13 to get a 10# Co2 tank filled here at a local welder supply shop. Where it costs $3 to get a 20oz Co2 tank filled at the local paintball shop.
The pfertz line is awesome. Its straight forward and easy. I mostly just got them to have to bottles so that I could by dry ferts once they were empty and just mix my own with distilled water for easy use.
11.4g - Rimless Tree Scape