I'm thinking of buying an optical mouse. I've seen one online that costs about £10 - $16(?) it has three good reviews for it too. I don't have huge problems with my mouse which is just a normal one that came with my PC but sometimes it sticks and apparently these optical mice are meant to be a lot better?

So just wondered if anybody here had used one so I could get a personal opinion of whether it's worth getting one and if they have a noticable difference? I do a lot of work with the mouse when tracing lines for drawings or doing work on Photoshop as I don't have a tablet so I need my mouse to be non-sticky!