For anyone who is worried about the two sided aspect and getting the pieces mixed up, DON'T. The makers of these puzzles planned ahead brilliantly and made one side with a textured surface so you can tell one side from the other just by touch and also by looking at the cut edge.
So far I've only had the chance to complete one puzzle--Enchanted Falls. It was one of the best puzzles I have ever done. The 'surprise side' was fantastic. Even better than the front. I'm looking forward to finishing the other two enchanted places puzzle I have and I will be ordering both the haunted places series.
For anyone who likes doing puzzles, I highly recommend these. They are not so challenging as to cause frustration but they are difficult enough to make completing them very satisfying.