Originally posted by micromacro I don't see IQ matches that price.
Well, how are you matching image quality, especially if you haven't used the lens? For shooting soccer, even at U10/11, I have a high confidence level that a modern AF lens, even the consumer level one under discussion here, will freeze action more consistently and more frequently than with a manual lens with stop-down metering. The value will be borne out from some of the excellent shots you will generate. I speak from experience here from my own initial forays into shooting sports years ago.
A monopod may help overcome shakes at 300mm. Most likely you can get an accessory tripod/monopod support foot for the lens.
M