I have an old craftsman one pull start that despite being used and abused for over a dozen years now (okay... maybe 15+), it still runs with just oil changes, spark plugs, blade sharpening, and new air filters. The plug fouls a lot, so you have to clean it often, but when it gets running good mid-summer, it is still a one pull start. Leaks a bit of oil, I think, but nothing too bad. I've had to fabricate a few replacement parts for it (the bar that holds the clamp down lever from going back too far, the metal bar across the bottom that lets you turn it, and a bracket to hold the front wheels together).
However, we've got a newer B&S Sears mower, and I'm not a big fan of it. Keep breaking the two little bolts that hold the shield on in the back, causing the wheels to rattle like crazy and making it hard to turn (which reminds me, I need to fix it... AGAIN), though it is a one pull start most of the time. Also, unlike the old craftsman it only has one speed. Why can't I have a turtle/rabbit!? I can tell it is built a lot more cheaply than the old craftsman, for sure.