Recs.
Updated
Specs
Pros
Pro Good organization
Music can be browsed by the usual artist and album, but Rhythmbox also allows for genres which aren't supported by all music players. It also has a very useful queue box.
Cons
Con No album artist field
Most other modern music players come with an Album Artist Field when sorting music. Collaboration is very common these days and often a song would feature multiple artists, but sometimes it's easier to just sort for Album Artists. It's a rather simple feature, yet Rhythmbox has repeatedly shot down its users for making that request.
Con No folder browse/add-to-playlist view
So few music players seem to let you browse by your directory structure and add songs to a playlist that way. That's unfortunate because it's a really useful feature and eliminates the problem of mistagged music.
Con Still no built-in equilizer
Rhythmbox has been around for a good while now and yet there is still no default built-in equalizer. An equalizer allows users to tweak the audio to their preference. It can also help compensate for hardware (for example, lots of headphones are bass heavy, but to get a more balanced sound an equalizer can tune the bass down a touch).