This is very nice module that will introduce You to small dwarven town and You will be on a mission to solve a crime mystery, playing as two famous detectives Half elf and I think gnome.
First about art, it is great and it leaves me wishing I could do such wonders. I like the style, yellow, grey, green portrait backgrounds and similar effects add a lot to atmosphere. What more could be said, it is really good.
Now about story. It is also very nice and interesting with exploring dwarven town and solving mystery of crown theft. I enjoyed it a lot though I finished it very easy and felt like I scored a critical, because after intro I started roaming through town and finished it almost instantly.
There is no combat in the game, maybe that is a good thing and for change I enjoyed it too, though as I have said how I finished it reminds me of my luck in rolls from last session when we fought white dragon (weak breath weapon attack, but with solid hit points), when I was hasted and from 4 hits I scored 3 with rolls 17,19, 18 making total of at least 70hps (with two handed sword with dmg 3d6+5) and wizard finished him when dragon tried to escape from the cave sealing it with firewall spell (or similar, but there was some form of wall of fire on the entrance)
Here are few screenshots and complete session of my gameplay (it contains spoilers, if You are about to play this module better read it after), but as it is really great I am sure I will have to play it few more times http://www.reonis.com/gulan/Jr/The_Case_of_the_stolen_Masterpiece_jr1.cb7