Frankly I am a little disappointed, the album is on the whole pretty good, not bad really words for certain titles, but because there is a big BUT: It's not Pop but electro -pop, you liked Stronger in 2011? Bah Piece By Piece is not terrible side. Kelly Clarkson has such a beautiful and powerful voice that the "spoiled" (I'm a little hard there) with this kind of electro pop ... in fact I like this kind of music but not really on his voice, I tried the guitar in several songs but I was able to found.
Titles Side "Piece by Piece" and very well written, same for the duet with John Legend "Run Run Run" but after listening to this album I jumped knew my 2011 CD to recover.
In conclusion, Piece by Piece is a good album but the "new" genre that introduced him as not only the voice.