Owned it for 2 years and it has never failed to start. It's almost fun to start. It's quiet with more than enough power. I'd guess the 2 strokes may have a better power-to-weight ratio, but if you can't start the 2 strokes, they aren't much good, are they?
If you have ever lived through the unbridled rage of having something that did not start on a consistent basis, this is a wonderful machine. I love it.
Although you don't have to mix the oil, you'd better be careful to make sure you change the oil and check it, this is a little engine and I'd guess it would not tolerate being run out of oil.
If you are using it and turn it on it's side or upside down, it will spew out oil smoke. It's only happened to me twice and it's not a big deal, not something I feel is a negative, given the quietness and ease of starting.