I'm new to iReal Pro - the former iReal B is recommended by Kieth Appleton on a number of his (excellent) youtube Hammond organ lessons (search for him) , so I got it. Nice app!! Been getting my head around it and 'written' my first song and posted it to the forum (Pretzel Logic by Becker-Fagan). So far, the biggest downside is not being able to choose guitars and keyboard instruments on the same song - according to one post I read from one of the iReal guys they are ALWAYS kept separate and you never get both on any one style. I presume that's a programming issue, 'cos I'm guessing that if iReal could easily make them all available for the user to decide on every song no matter what they style, they would. That's my only (semi) serious bug-bear so far. iReal - you should all be congratulated - great little app!!