I have a window and like it. It looks cool and other people like it. Plus when I'm trying to piece together a build list and I think I'm missing something I look into the window and go "oh yeah, I need this part or that part".
Yeah thats the problem for me deciding which case to get.
Since this will be my first time building I dont know if Id do a good wiring job plus window=cold cathodes,uv,sleeving etc but at least the pay off is worth it
For non window cases you dont need to worry how it looks
Also you save some money from not buying the cold cathodes and such