It says that the dictionary will sell for 0.99$ for one day only. 5 days have gone by, and the announcement is still up.
Besides that, you sometimes get the feeling that the definition entries were written in a sloppy manner, as I was able to spot some mistakes.
On the good side, the user interface is friendly and neat. The dictionary can meet the needs of a person who isnt interested in the smallest nuances of the language.
Akeel Ali about Concise English Dictionary