Review on Robust Robinair (RG3) Portable Refrigerant Recovery Machine, 115V, 60Hz -Efficiently Recovers Liquid and Vapor Refrigerant by Nathan Jones

Some other reviewers have mentioned how long it takes to fully evacuate the system. Depending on the size of the system and the length of the connection lines between the outdoor and indoor units, this can take some time. But it's very light and compact, and I found it fast enough for its size; About 9 pounds of R22 was removed from a 55 foot split system in about 1.5 hours, but it was done under ideal conditions and using an empty recovery bottle.