This CD-Rom is extraordinary informative. The entries have IPA transcriptions and very clear explanations. I particularly like the use of colours to differentiate the words from their synonyms and antonyms. When you look at the synonyms or antonyms, you get loads of terms to choose from - and I dare say you could feel a bit lost not knowing all their meanings - but what you have to do is to simply right-click on each word and a small dictionary window appears, giving you extra information on the meaning of the word you didn't know. By clicking on the "Examples" entry, you sometimes get hundreds to thousands of examples taken from the Bank of English, i.e. a 450 millions words database of contemporary language from real sources of information.
My only disappointment is that the CD-Rom doesn't install completely onto my hard disk and I have to run it every time I need it, but it's really worth and I am happy I bought it.