As an owner of now four TentBox's, I can absolutely attest to each of the benefits of each model. I have the lite 1.0, a classic 1.0, and 2x Cargo 1.0, each on different vehicles. The cargo 1.0 is my most recent purchase, and in fact, I was so impressed with it that I bought another one secondhand for another vehicle. The headroom height in it is impressive, and the reality is that your headroom height is only needed when camping at one end of the tent. I love my classic, but it is a little more limited in headroom than the cargo. I love my lite 1.0 but just takes a little more effort to close up. I now have a cargo on top of my jeep wrangler, which currently sits on a 3.5 inch lift kit, and 33 inch tires, which makes it a little bit difficult to get up and down upon to take down the classic. If Truth Be Told, my classic on top of the wrangler was the hardest tent of all three varieties to take down . The biggest advantage of the cargo on top of a tall vehicle is that it only takes one strap to be pulled down at the rear of the vehicle to close up the tent again. This is an absolute game changer on my wrangler, so I actually bought another Cargo to go on top of my Cherokee as well. I am a massive advocate for this particular type of lifestyle, and for finding the advantages and disadvantages of products, and how to best use them. For me on the wrangler and the Cherokee , absolutely the cargo is the best way to go. Now I have the lite 1.0 on top of my camping trailer and the classic on top of my van.