Very useful
Though the dictionary is lacking English transcription, it was extremely useful during my last trip to Iran. Every time when English and sign language failed to get me what I wanted, I simply typed desirable item name in the search line and showed to the person I was talking to. I used dictionary every day - just to be able to connect to people, and got great response from locals. Wish dictionary had an English transcription, so could talk to people too!
Mashk about
iFarsi