While the Y-Cam's shape (relatively large square front, but small depth) is OK indoors - it is a problem finding 3-rd party external housing to mount it outdoors - so you probably want the official one. However, as you can see, it is round, not square and relatively long - so don't let the picture deceive you, this thing is huge!
If you want to have a "mean looking" camera - this one's for you! I can't help thinking the shape of the housing could have complemented the camera's shape and thus be somewhat smaller?
Considering it is just plastic - although good quality - I think it's too expensive; good quality external housings cost quite a bit less - though probably won't fit the Y-Cam.
The cables are pretty short, approx 1.2m? Considering they go inside the case, require a bit of slack outside (in case you want to rotate it later) go through the wall and be a reasonable length inside the house that is too short! Even with the hole next to the leg I'm left with less than 10cm cable inside - forget about routing it inside or outside.
While swapping the Ethernet cable to a longer one is quite easy and making your own power cable not hard (with some soldering skills), I do think they could have included 2-3m cables considering the cost.