Lots of people are using it. Out of the box ran using their “sop” the results will be sub par. You will need to immerse yourself in the world of analytics and get a god understanding on what you are doing and how the unit works.
Best starting advice i can give is get yourself a real scale and a set of volumetric flasks and a side exit syringe that wont core shot the septum every time you do an injection. Their 20 dollar scale and their “use the 40ml vial filled to the neck” instruction is far from accurate enough for anything analytical.
This thread covers a LOT about the sri gc