While I did finish the story mode of Escape Rosecliff Island completely, and did have a fair amount of fun with the concept of searching for objects hidden where you'd expect them least, the game very, very quickly became very redundant.
In my opinion, searching for 80 objects in one level (the highest amount you'll have to find) is just too much. There's 25 levels, and on average, you'll have to go through 4 or 5 different places to look for objects.
One small highlight, however, was the finding of all 50 locks, which would then permit to play the bonus games, as well as looking for all the objects in every of the 25 pictures. With well over 2000 objects to find, it will definitely take some time - and I took this time to find all of them without taking hints.
Still, I wouldn't really recommend this game, unless you have great patience and tolerance for redundant gameplay and repetitive actions. I purchased this game in a bundle of Popcap games, which in my opinion is the only way you should get a hold of a copy of this game.