Sadly, it’s a bad port. Whilst it does seem to be written in iOS’s native application frameworks, it doesn’t feel like an iOS app. It uses Android icon assets and Android pagination controls. This is a benefit to people who predominantly use an Android device for consistency reasons, but for me (and others who are firmly in the Apple software ecosystem) it’s a big negative.
Also, the app isn’t linked against the iOS 7 SDK, which means you have to make do with the iOS 6 keyboard when searching for a song.