5 stars: I really like doing puzzles, this saves from having boxes of puzzles around and saves our trees. There is a huge problem though, after about 20 puzzles the puzzle pieces freeze and I can't move them, when I go back to my puzzle after extreme frustration it's all over the place, not how I left it. This is my third or forth try for this app. I hope it's fixed now.
4 stars: Good game. I like that one can easily tap to see a view of the whole picture. I like the selection; esp. of scenes of nature and animals. I like that my concentration is not disturbed by ubiquitous ads. I appreciate the 'loud' click when two pieces fit, but I'm put off by the demure sound when a piece fits in the puzzle as a whole. Otherwise 6 stars.
4 stars: This is fun and relaxing. You choose between 2 puzzles an the level of difficulty. Very pretty pictures. I've only done 2 or 3, but I definitely recommend this game. I chose 4 because I've only been playing for a few minutes, but this is a good game. Ads are after each puzzle, so there are no interruptions before you finish a puzzle. I'll probably bump up the rating to 5 stars soon.
3 stars: I've just installed the game & have only done a few puzzles so I'm rating only a 3 for now. I love that there are NO ads during the puzzles. The only thing I don't like, is the pieces don't stay within the box, like if I'm trying to place a border piece, I have to fuss with it to find it's spot. Will update my rating again, after I play more, but...