Nice interface, nice sounds, BUT it is useless for pro recording. It is the only audio app I have which does not recognize my iRig audio interface, and Audiobus does not see it at all. The manual says it supports IAA, but not on my iPad. So, I can listen to it on my iPad, but that’s it.
Also, it looks like the developer has given up on this, as the last update was 3 years ago.