Bought this package earlier this month, for only a few quid more, thought I'd go for the Office/Mouse bundle. Firstly, Office 2010 is so much quicker than Office 2007 and the ribbon interface is a massive improvement over 2003 and earlier editions, that is, if you give it time.
Initially I didn't like the Ribbon UI, but most of it really is common sense more than anything, e.g. in Word 2010, the options for formatting your font are under the Home tab and in a section called 'Font', want to change your page layout, go to the 'Page Layout' tab. It's obvious when you spend a bit of time with it, you've just got to know what you want to do and you'll find it much easier than before.
As for the mouse, it's brilliant, I don't know what's wrong with the other guy who reviewed this but mine works a treat on my laptop.