I bought a Bosch GO, 2nd version at the toolfair show for about £55.
I noticed later that a version 3 has been released in Asia but not common in uk yet, for £70+.
The 3rd version adds an LED which is a good improvement but not worth £20 extra.
Anyway, they aren't bad. They can be made to run by pressing the button or pushing the bit firmly into the screw head. There's a little springy end float to the spindle and power comes on when you push it in firmly. It has torque settings but just easing your grip will let it twist in the hand and push back from the screw which stops it.
Speed isn't too fast, but much quicker than you can turn a screwdriver.
I find it much better than the old bosch ixo, which was similar but in a different shape.
It has more torque than I remember the ixo having. Enough to be useful.
Since buying, I almost never reach for it for woodscrews. It is really a tool for smaller machine screws on electric appliances or electrical faceplates. These have a lot of thread but don't need lots of torque. It is great for jobs with torx and hex head capscrews. Those fly in and out.
If I was putting in new smaller woodscrews, I'd probably use one of those milwaukee drill bits with a hex shank to make pilot holes. 2, 2.5 or 3mm would easily work in the "GO" and would make putting woodscrews in easy. The slim form factor is nice.
It's in my toolbag but I don't use this a lot. The chunky little bosch 12v drill driver has become my goto since buying that and I've all the other screwdrivers I need. When I finish rebuilding my workbench, the GO is going to be left on it with a #2 pozi bit and then I imagine I'll use it a lot more for sheer convenience.
It might be super handy to drive a hex shank countersink.
Pilot drilling not so much as the bits are only held by magnet and hex shank drills tend to come out of the tool as you pull the drill from the hole.