By the knobs Sphero has a better grip on the surfaces and can even play easily swim. By coating the Sphero filthy also no longer so fast. Since the Sphero now rolls with a coating on the floor, they scratched less. The neighbors will be glad my purchase: Indoor is the Sphero now much quieter.
Hexnub comes in a small plastic bag. I would suggest here that we designed this a bit bigger, so you can put the possibly wet Sphero without problems in the pocket without the vicinity (in my case, for example Uniunterlagen) gets wet maybe read the manufacturer of this Review. That would be great!
For just 11 euros I will next me another Hexnub buy the Nobben suit is available in many bright colors. If the Sphero turned enlightened the Robotor Ball thanks to Hexnub in each color. From my five Daume there high!