So much potential---but errors hold it back – Morse Code Training Review

So far this is my favorite app for refreshing my morse code, but the error for the number "zero" would drive me crazy if I were a true newbie. The sound is correct but they indicate that it is something like " - - . . -" or something close to that instead of " - - - - -" as it should be. Cmon guys this is an egregious careless error.
Review by Jay Lord on Morse Code Training.