I just finished Emerald City Confidential and I had a blast! It took me under 10 hours but I do not regret buying it at all. This game really takes me back to the heyday of point and click adventures. The puzzles are NOT overly difficult at all (there is a built in hint system for each puzzle that will ultimately reveals the answer if you get stuck) and while you won't find yourself combining items or combing over every screen looking for useful inventory pieces what you will find is well-written and executed dialog, interesting characters and a fun story with an interesting, twist ending. There is also an interesting magic system to this game that definitely adds some depth. I am not a huge fan of the Oz books or movie(s) but I still found myself getting wrapped up in the story and there were plenty of characters I recognized from my child. The funny thing is that I didnot even realize this was an Oz game... shows how little I know about the the Ozian Mythos.
If you are a fan of the old-school Sierra or Lucasarts point and click games, enjoy a funny story with some easy puzzles, or are a fan of Oz check out this game. Just do not go in expecting the depth of a Broken Sword, Monkey Island, Beneath a Steel Sky, Sam and Max, etc. (You'll still have fun!) I'm hoping for a sequel or something in the same vein.