Is it generally a good idea to put side windows in a slideout?

[BravestDog]

Seems like there are some slideouts that have side windows, the ones that would be fore and aft,
<a href="http://truckconversion.net/photopost/showphoto.php?photo=1442" target="_blank">
photo 1</a>
photo 2

and some that don't have side windows like these two photos show

photo 3
photo 4

Seems like the side windows open up the slideout making it more living conducive.

Why would somebody build a slideout without side windows? Would they regret it later?

Any comments on this?

[SandCarFan]

I prefer the windows in the sides of the slide-out. It allows more light on the inside of the coach.