It does translate many words, and conveniently doesnt require a network connection to do so.
However, on a recent trip to Argentina, it couldnt find the word I was looking for in about one in ten searches. Also, it cant handle phrases or idioms, even the most common ones.
This would be a good value if it was free or even 99 cents. At $4 it is a poor value.
Slowtapper about Accio: Spanish-English, v2.0.1