I see everyone has there preference on the type of walk behind they like. I see everyone one talking about Quick 36,44 and so on and Scag, Toro, Exmark, Lesco. I don't want to here about your favorite mower. I want to know about proven field tested reliability over 5yrs. I want to hear honest views about problems you had with a specific brand or none at all over the time you owned the mower. My personal preference is Toro and they have never let me down. I have to wander about all the hype Quick gets, has anyone run them commercial for more than 3yrs? They dont look like they would hold up compared to other brands.