I am currently running the Carbon Doser and it works flawlessly, the only down side to it is the clicking noise it makes. Every time it activates it clicks, you can't hear it from across the room or anything like that, but when your close to the tank you can. I got mine from a friend and he had it running for several years so it seems to be holding up nicely. It is very user friendly and micro adjustments are simple. This is my first regulator so I have no experience with any others. I recommend you take a look at this thread " Alan's CO2 system builds " as there is a lot of good info and some really nice builds on there. I am going to have Alan build my next set up for me as I plan on actually showcasing the CO2 set up on the next one.