Same here, I have one on my Plus 4, the wife loves it as she is a bit on the short side and it gives her somewhere to rest her feet. I do keep documents in it, but mainly those I don't normally need such as a copy of the MOT, insurance, V5, circuit diagram, and anything else needed when out of the UK. Even has enough space for an electric tyre pump. Tools and spares are in another lockable box under the bonnet.
