I bought this machine because I needed to do our 134 and our 1234YF I like the machine, but the manual leaves a lot to be desired because it doesn’t go into a lot of detail so I have to learn on the fly as I’m working on the car. my 25 year old has purge on it and does not. The software database is incomplete and so when you advertise that you have a software database, I actually use it because I work on a lot of different cars and would be nice if you had another function called vacuum and recharge , the reason I say this is because when you work on a car if you have to evacuate and then do the repair and then recharge it would be if you could hit button vacuum injection and recharge my CR 300 has this feature and I like it a lot other than that it’s good