This is a good CD overall, quite unlike the previous singles from Pop which were packed with remixes.
If God Will Send His Angels (Single Version): This is the version that was on the City of Angels soundtrack. It is shorter than the album version by almost a minute, but is not entirely the same. There's a different vocal part in the end that sounds really pretty. Still, the song's doubt may put off some listeners. "God's got His phone off the hook, babe/Would He pick up if He could?"
Slow Dancing (featuring Willie Nelson): This song originally appeared as the B-side to the Stay (Faraway, So Close!) single. While that version was just Bono and an acoustic guitar, this version features Willie Nelson on lead vocals, along with a nice harmonica part. Bono wrote this song specifically for Willie, but it took him a while to get around to recording it, as evidenced by the amount of years separating the two recordings.
Two Shots of Happy, One Shot of Sad: A song Bono wrote for Frank Sinatra and performed for his 80th birthday celebration. If you listen closely right at the end you can hear him say "Happy birthday, Frank". Pretty good song with Bono singing along with a live swing band. Not technically what you would call a "U2 song", but worth a listen nonetheless.
Sunday Bloody Sunday (Live From Sarajevo): Normally I'm not much on live tracks, but this one is an exception. This version is taken from a concert where Bono's voice gave out, so The Edge had to step in for vocal duties. It's cool to hear him sing this classic with just a guitar accompaniment. Definitely different. Worth adding to your CD collection.