I've given this a thumbs up overall because for the money I spent and the enjoyment I got out of it I think it's worth it however there were a few frustrations that put me on the fence about the thumbs up. Mostly because the 'scatter shot' approach to other games by this Dev make me think it just about churning out as much as possible with the love and attention some of the other small Developers put in.

The Good:
Beautiful images (good for us as players, but I'm not really giving credit to the Devs there as AI has done all the work).
Simple game play, nice drag and drop, and the pieces click together anywhere on the table like a real jigsaw.
Different modes give an interesting mix of play. Easy provides a faded image to work over and the number of pieces option makes this good for most ages.
Very reasonable price point (especially on offer) for the time you can spend playing it it's well worth the cost.
Simple and relaxing. It does exactly what I wanted it to. Spend a little bit of time here and there with a relaxing jigsaw.

The Bad:
Just a general lack of thought in the layout. The 'Solve' button is slapped in the lower middle part of the play area and has more than once got in the way and I've accidentally hit it and ended the puzzle. This should at least have been put to the side with the other buttons, and for preference all buttons should be outside the play area.
The background wood effect pattern is not the best choice to look at against the pieces. I get it's better looking than just a plain block colour but it doesn't help identify the bits. Fade it out a bit maybe or give a choice of backgrounds.
No full screen is just strange, possibly this is on me if I just haven't found where this option is hidden, but it should run full screen by default I think.