Hi I just ordered a sleeper with the bunks going horizontally behind the drivers seat and passenger's seat. It is a relatively new concept in sleepers and I understand mine is only the second one to be ordered. It allows your feet to absorb the impact of a quick stop etc., and eliminates the need for a top bunk. However if you are a husband/wife team, you do not get to sleep together when sitting still:-( but that can be rectified by putting a slider under the front of the bunks and having a two-piece mattress fill in the space in the aisle so you can sleep together vertically. Why mfgs didn't think of this before is beyond me, but I actually designed the bunk myself and gave it to them, it is getting some good publicity and we may agree to show it next Truck Show season. It doesn't take up a lot of extra room and you can still have your cabinets, above and below the bunks and a frig, micro, tv, sink etc. We even commissioned a porta potti closet in between the bunks for those who hate getting dressed and running into the truck stops. This CAN all be done in an 84" bunk but I ordered a 96" bunk. Which gives us extra room. When I get it, I will make pictures avail to anyone who is interested. Thanks!:+