Bottom line:
Performance: 10/10
Basic price: 7/10 (needed a few add-ons)
I bought one of these for my kegerator/paintball tank setup, and it has functioned well and durably, despite being one of the cheapest setups. I eventually bought a 3000 psi gauge for it so I had a better idea of my overall gas reserves, but I really wish this set included or had as an easy option, a 0-30 PSI gauge instead of the 0-60 PSI one. Since I'm usually using this set at 5-10 psi, this crams the normal operating range into around 10% of the gauge and leaves it not only hard to read, but frankly in the most inaccurate mechanical range of the gauge itself.
I still use it and probably would buy it again for my purposes, but just wish I didn't have to get so many add-ons to make it what I really need.