Got a roof top tent on my trailer. Howling Moon, quite nice. They are pretty well known for their quality. My family and I enjoy sleeping there. Quite comfy we don't worry so much about any wildlife crawling into the tent.
But it is on an offroad trailer for overlanding as all the other stuff that would make the jeep heavy like fridge, batteries kitchen, water... but all designed for a family of 5 overlanding.
If you look for a one person solution that is amazingly comfortable try the stretcher tent from Oztrail. Got one, really easy to set up and really comfortable.
You can check both out if you want to.