Pros and cons of a shell?

My shell has a third brake light,installer took the bulb out on the cab so you don't get a weird reflection in the rear view mirror.

 

Mine also has this. It was the only thing on my shell that needed replacing when i bought mine used. I got a replacement off ebay and wired mine with a quick disconnect in case i ever needed to take it off i wouldnt have to cut wiring.

 

What kind of mattress are you using? I was contemplating building a platform but dont think ill have enough space since i have a cab high shell and im 6'1". Im now looking into other options..

 

They are Kelty self inflating,about a 1" thick,22" wide,74" long.

 

Thanks!