The differences between tiers - Unlimited is better quality, has an offline mode, and allows full cell phone access. And you need to sign up for an invite to access the free version - which I've done, so we'll see.
Gleason also released an album called "Jackie Gleason Presents Music to Remember Her". And believe me, it works! I listened to it last week, and I can't believe I forgot I has a twin sister. Not to mention my wives from Utah and West Va.!