Warning: Despite the claim in the description this is NOT a English to Japanese Dictionary!
This dictionary appears to be a very nice Japanese to English dictionary. I imagine it would be useful to a native Japanese speaker. For a native English speaker, you cannot search for Japanese words using Roman-ji in any useful way and get a English translation. Essentially it assumes you know several thousand Kanji not to mention Hiragana and Katakana. It also uses a lot of Kanji in describing English meanings. Since it is not what it is is advertised as, I rate it as only a 1.
ChrisRJW about
ウィズダム英和・和英辞典