I have the Bosch GOP fitted with the 10.8v batteries.
If you go on the Bosh forum you will find not many are happy with them.
Bosch have now introduced an 18 volt version.
Both my batteries have now had the fixing/holding lugs broken so they don't stay locked into the tool, so I've made my own clip to hold them in.
Mine makes my fingers tingle after a while.
If I were to buy again I think it would be the Makita 18v jobbie.
