Stihl's - well your luck has been better than mine. I've had 3 POS Stihls in a row, never again.
Along those lines, I also once bought a self propelled Husquavarna mower- touted on internet at the time as one of the best. Rather expensive. Got it home, it wouldn't start. Mis-built carb. Over the next 3 years I spent more in repairs for various things than I did original purchase price. Took it to the dump and heaved it!!! Another never again....
That cheap-azz Craftsman from 10 years ago needs a blade sharpening, however...