Hi my wife has borrowed a thermomix for 2 weeks from a friend to try it out. ( is now looking at how to fund 1!!) 

A new one is a bit Out of reach but can find them secound hand.

There is a couple of options the tm21 or the tm21 special edition but the only info I can find is it comes with a second screen but can't find a manual/ picture to tell me what it does?

And is it worth the extra money?

Thanks Simon