Primarily professional translators need the large version and since then work on the computer and can not constantly look up in a book, a digital version is the more meaningful and also more environmentally friendly option.
The product includes the ability to seek the translation of a word show when you drive over it with the mouse, but it is (especially when working with Trados) not a bad idea in addition to set for this function key combination, so you do not constantly translations abgezeigt gets.
As far as I can tell it's the new version of what is absolutely the best and most recent available on the market. Although the dictionary is enormously extensive, I have but a few terms can not find it, but it will be in a few months an update that you can download then (if you own the Dictionary) for free.
Big plus in my eyes: you can easily create your own custom dictionary, and this feed with their own entries, for example, customer-specific terminology or missing lemma..
The whole is definitely worth its price and for people who are professional enough, deal with language and / or technology, indispensable.