I've got a snap-off one for wy woodrim steering wheel. It has a key so you can keep it locked on (to avoid such practical jokes!)
I needed to fit a 10-15mm spacer between the wheel and the snap-off adater to enable the horn button to work. With 90% of these kits, including mine you will need an aftermarket boss (which you will already have if using a sports wheel with 6 holes)
I've not tested the practiality as the car is still without MOT, but i have noticed that due to the kit and spacer the indicatos ae a little harder to reach due to the new further forward positioning, driving is more comf though.
I'll put pictures us when i can. You can get these 'snap-off' kits quite easily on ebay and for around £35-50 (they are £110 new)
Dom