Voodoo Lounge is a fairly blah album. It has moments of great music that are sadly caught in the middle of an otherwise forgettable album.
Essentially, the songs on Voodoo Lounge that are meant to rock out in a sort of vintage Stones way (such as Love is Strong, Sparks Will Fly, I Go Wild), come across as rather flat and a little bit silly. If you can forget about the Stones' past accomplishments in rock (accomplishments such as "re-defining rock"), perhaps these songs could be enjoyable. However, compared with what they've done in the past, it's disappointing. I'm not a listener who longs for some "Golden Age" of a band and who therefore hates all new material. These tunes simply aren't that good.
However, the album's ballad work is generally quite good. Out of Tears, the famous ballad from this album is good, but carries on a bit too long to truly have an impact. However, New Faces, The Worst, and Thru and Thru are all devastatingly beautiful tunes. Okay, I'll admit that Out of Tears DOES tug on my heartstrings...at least for the first 3 1/2 minutes of the tune.
I don't recommend buying this album at full price; however, you can find plenty of cheap used copies. If you enjoy Stones' ballads, then you should buy a copy (used) for the three (or four) truly good tunes here.