Thanks for the replies guys/gals
So what is the difference with the "FitBit Force" and "FitBit One"? I was having a look on Amazon.co.uk, and I can't find the "force" one, but I do see a "flex" ... are these the same?
NB- that tracker looks perfect for what I'm after. I'm a bit of a rubbish sleeper myself, so I like to try and keep track, so I can see what things affect me the most