Nice idea and well executed! I like you concept here. The 'waldo' is clearly seen, but by being translucent not the main focus of the shot. Your angle and composition are good. Might work stronger at a sharper angle so as to block out the divider from the left side of the shot. Being that you are working with light from outside as well as inside, your metering is good. The balance between light and dark is good. You have a little noise in your shot, but not enough to distract.
Well hidden in the reflection and yes it does appear kind of ghostly! The photo seems a little grainy to me, where was your main focal point in this one?
a little "noisy" on the foreground... i had the same problem with one of my entries, and somebody recommended "neatimage" - free demo software that works wonders!
A little grainy, esp. the pole in front of the window and the other stuff that is similarly colored (to a lesser degree). Maybe a different ISO setting? (If available) Waldo fairly well hidden, nice idea. 7 Swash