I built a clone that works the same (~$60), and for the most part it works as advertised. Blichmann has a chart showing temp/psi, that is very important to follow. I underestimated the high PSI settings required, I found by using the highest 'green' psi setting worked best. As an example if your keg is at 65 F then you will be using 30psi.
Run for 45 mins and check it, and every 10-15 after that until you get it where you want it. I purge the air out of the keg before checking the carb levels as it will be at ~30psi if you don't (let it set for a few before purging).