Really!! I have now being riding on with the space grip for over 3000 miles!
The nice feature of the space grip is that it allows you to try numerous shifter positions. I tried the shifter all over the place. The most interesting was parallel to the brake hoods pointing up. (Note I did the testing without bar tape.)
After trying several different positions I end up in a similar position to that of Thorn accessory bar but fine tuned to the reach I require.
To anyone who is interested in using a space grip I would say that it does work but you MUST locktight all screws. I would also add that I agree with Danger Mouse in that it is not strong as Thorn accessory bar- although I have yet to brake it!