It could be as reliable as a XR,KLR, DR and I could win the lottery.
The Berg motor is a high performance, light weight race design. Totally differnent class than XR,KLR,DR. Those motors are heavy, overbuilt designs meant to last a long time.
Apples and oranges.
I use my 07 550 as a dualsport bike and it is reliable. However, every 200 hours it requires top end work at the minimum. You gotta pay for performance one way or another.