My son is learning Spanish and this app is a great way to start. The letter are well pronounced, and the song that is included helps a lot.
As for the alphabet and photos it's great also, not cluttered with too many pictures and kid friendly (with each photo having a sound to relate to) it would be nice to have more photos with the option of having them rotated. Also have an option where the word is spelled. I upgraded to the full application and so far haven't had any trouble with it.
While the pronunciation is set to spaniard Spanish, I find it ok considering there aren't any other apps available like this one (Spain's flag should clue you in). This isn't meant to teach how to speak, just give a leg up in learning Spanish (I am fluent in Spanish.)