I have this one at work and just ordered one for home.
Perfect size (not as bulky as MX) - very nice additional buttons and lovely feel. really recommended.
unfortunately, their delivery is 5.82, which anyway ends up as 27, next cheapest I could find was Amazon at 30.81 with supersaver delivery which usually takes few days longer than comet delivery. Also, might be available to collect for, not checked that.
Rev up your laptop with this Logitech VX Revolution mouse. Powerful controls let you fly through large documents at hyper-speed, or navigate lists, slides, and image collections with click-to-click precision. Perform instant web searches with the click of a button. Zoom in and out of documents and photos with fingertip ease."