We use readers balls in the league, these for me aren't very consistent in their longevity, quality & overall performance.
We knocked the runs off on saturday in under 28 overs and the ball the opponents used looked like a rottweiller had been chewing it. Ours was still in decent condition after using it for 32 overs. Both the same league ball
I've used the tiflex ebay balls in nets for a few years, they've seen a load of overs and are still in really good condition and continue to swing and seam