I use both the incredibles type and these
Readers Cricket Windballs for £2.21 at Newitts.com and I prefer these, they have a more realistic bounce and they last longer. The stitching on the incredibles comes un-done too readily. The other advantage of the 'Windballs' is that they're half the price of the increadibles and if this is cheap enough for you Newitts will deliver FOC at the minute.