Has anyone used the Nike Precision Power Distance balls? I picked some up for $10 a box (last years models since the new boxes are different). I was wondering if anyone had any thoughts pro or con on these balls so that I have some idea what to expect. I expect that they are not top of the line, as new, they only cost $16 a dozen. For you folks that know about these things, I have a slow swing speed and I don't even know the compression on these balls.