The machine itself: impeccable, very good keyboard, good screen legibility with handy backlight. I am a little embarrassed by cons for transportation, because it emits a fairly powerful electronic noise, inaudible but detectable when the approach of a short wave radio frequency, which can risk having an effect on a eg credit card (precautionary indicated in the instructions), so I have to have in mind when I lug around him not to approach too my card! Software Level: search functions are impeccable, we quickly find what we want in all dictionaries. Caveats: 1) no mode of conjugation verbs; 2) apart on the box, the version of the dictionaries is not always indicated on the home page of each, so you have to trust! ; 3) PC transfer software may not be compatible with its operating system (eg 64 bit); 4) there should be a simple upgrade system dictionaries and possible addition of dictionaries (or eg grammars), especially since it is a SD slot. Overall, very helpful and I learn a lot! More practical than to bring a laptop in a conference to type a word, reading an article in English in a cafe, faster than search for a term on cell phone over wifi or 3G (I have no iphone or similar ) ...