First bargain post.
I bought this steering wheel cover over a year ago and it has served me well. In my opinion it ticks all the boxes; cool to touch on hot days, very grippy especially when performing u-turns, nice comfortable feel, easy to fit onto steering wheel, and the right price, even at $15, it was cheap to me.
Prior to buying this one, I bought a sponge steering wheel cover because I love the grip it provided, however the stitching that held it together split open only after a month of use.
You can purchase it from ebay as well, with the discount, however, the shipping cost kills the deal:
http://www.ebay.com.au/itm/SCA-Steering-Wheel-Cover-Contour-…
This is the wheel deal guys