I received my machine about a month ago and have used it just about everyday with one grouping or another since then. The machine is very well balanced and the motor is extremely powerful. ( I often forget as well when switching from my Bishop or coils and its pretty funny to see the clients face when it screams at 8 volts!)
I just did an armpit today and used it with a 25 mag and never had a problem. Solid machine, and great customer service.