Hi, as a songbook, I have had more use from the two beginner song books, just for the repertoire. That’s because Justin put the acoustic songbook together mostly covering 80’s and 90’s music, which did not reach me at that time in my life. Too many performers I hadn’t heard about. So I have little feel for the songs. So back then it had me focus on the odd three Beatles Songs in there (Blackbird, Norwegian Wood and Here There and Everywhere. There are two Nirvana Songs there, one of which I did (In the pines), and Tears in Heaven and the Acoustic Layla from Clapton’s unplugged album , and Father and Son, from Cat Stevens. That leaves quite a few songs that I did not know, and hadn’t listened to. Some Gordon Lightfoot would have been nice, some Neal Young would have been great, and some other folk and singer songwriter oriented songs from the late 1960s. All in all, out of the 50 songs in that book, I have 5 with one tickmark, 3 with two tickmarks and 3 with three tickmarks. I guess 20 years later not all of the songs in the Acoustic Songbook have withstood the test of time as regards popularity, and some that deserved to be in there actually ended up in the 2nd Beginners Songbook.
Said that, I think I have almost all of the JG songbooks, and never regretted getting them.