See that volume control button at the top right corner? Reason enough not to use it. All civilized music software should let you control volume without having to click anything at all. Hell, even iTunes does it and we know many people aren’t fond of it.
The fact it’s using Mono doesn’t really help its case either. The decision by the developers to also encompass video libraries makes me thing it’s trying to do everything but does nothing well.
Did not bother installing it.