Caveat: The title "Pop" is misverständlich, because it is certainly not to pop music, but rather to pop art or the like.
Personally, I'm quite a U2 fan and have the album up in the beginning, is down. I probably would not classify it at the absolute best U2 albums, but it has its own style and sound and I really like. (The U2-90er sound, which strongly contrasts with the 80-sound of the band (as in my opinion the 2000s again more to the 80's remember), is in here, but putting style is the style of the band at the time " Achtung Baby ".)
One can perhaps share the songs in the middle of the album, and form two groups (the better I like) and the slightly slower (which are perhaps particularly unfinished) slightly faster.
The somewhat unfinished character of the album is apparently caused by the pressure of time during the recording, and perhaps comparable to the extra material from the "Achtung Baby" recordings (for that deluxe versions of "Achtung Baby" know).
As a fan, which one is probably when rummaging in relatively old, not so well-known albums of a band, you can at the price (when I bought it, it cost about eight euros) does not do much wrong (but you should the 90-U2 like, "Joshua Tree" there really is not here).