Is a traditional dictionary good or an electronic dictionary good?

Now the domestic electronic dictionary market is uneven, almost very few can be included in the complete thesaurus electronic dictionary, so the tool book or more authoritative and reliable, but the tool book is more troublesome, often there are several need to go back and forth to consult, and very heavy, carry inconvenient, so in the portability and convenience of the electronic dictionary is better, the market is also very professional electronic dictionary, such as Casio Electronic dictionary, he is a complete collection of all aspects of the most classic authoritative dictionary, more convenient than the traditional dictionary, and the same authority. It is worth mentioning that the E-A99, included 100 books, so that in the car can also flip through the books, do not understand the place can also be accessed at any time, it is the same as easy to carry the heavy books and dictionaries.