I've had good luck with my Karcher so far, despite all the nightmare stories people have on their units. I got my Karcher almost a year ago and I've been using it 1 or 2 times per week, every week. It has been working great in 90 degree weather as well as 20 degree weather. I use it like crazy every time I use it and it just keeps running, but I do wonder when mine is going to crap out on me. The model I have is Karcher K 3.67M.