The Supertramp is great for adventuring, sleeping, and having some comfortable protection from the elements when going on a 10-day trip for vacation. Where it fails is as follows:
Seating/Dinette: No matter where you put the Lagun table, it will always be in the way in one way or the other. It looks great in the tour videos where a single person rotates it around, out of the way, etc. But in a real life scenario it will be in the way unless you are the single occupant.
Electrical: The original DC to DC charger and MPPT solar controller were completely undersized. They made some improvements following my suggestions, but you still have to spend money on optional upgrades if you want to use the AC or run Starlink and some other things and have the ability to recharge the batteries properly.
Storage: Again, in the tour videos it all looks great. Plenty of storage - which is true. But no matter what you may need, you cannot just simply open a cabinet door and grab it. You will always have to remove pillows, lift the bed, and so on. For a week-long trip this is not a big deal, but when you want to spend extended time in the Supertramp it becomes old and cumbersome quickly - especially, if you are not alone. OEV has started to offer some upper cabinets now which is a great addition to their campers. I have the feeling Supertramp will follow suite on that as well. I am adding the shower setup here under storage. The shower is technically easy to set up - especially, when it is just you inside the camper. But with more than one person it can be challenging. If you want to use the toilet at night (or whenever inside with the door closed), you either have to open the storage section it is in, remove the pillow, lift the cover and then either open the toiled or lift it out and place it somewhere. I placed it in the corner at the door on the pillow so that I could take it easily in the dark, put it on the floor and use it. If you try to remove the pillow and open the storage in the middle of the night, you will be fully awake by the time you use the toiled. This is really just for when inside and mostly at night. During the day, I always go outside for #1 and if it is not too cold and nobody around, I take the toilet outside and go #2 while enjoying the scenery.
Living space: If you spend time inside the Supertramp on cold nights or rainy days, it is very cumbersome to move around due to reasons mentioned above. But you also do not have a good space to put your wet boots and a wet jacket. Or if you have a larger size dog it is difficult as well. For a week during summer or the warm weather season where you enjoy the outdoors it is all good, but for longer term I did not like it.
Customization: The technical side of the Supertramp is actually fairly easy to upgrade from an access perspective. Of course it is not cheap, but having access to all the electrical or plumbing is very convenient when making upgrades. The living space itself is much more difficult. When I visited Supertramp in Colorado I looked at the living space and pictured where I would mount a foldable table top to make a desk and a few other things. The counter/cabinet walls however are actually super thin. Not something I inspected when I was there. I simply assumed that it should be easy to do. Same thing with drilling holes into the walls to attach things to the walls. It is not possible in most sections of the camper. It is composite material and unless the specific section has stronger material composition or support inside the wall, the Supertramp team recommends not do it. So, I could not install a monitor stand or a foldable table top or a shelf or whatever. I made assumptions and I should have checked, but you see all those van conversions, camping trailer conversions, and and and - it looks so easy to do and then you find out the hard way you can't.
Unfortunately, when you buy a camper (any camper) it is hard to think of all these things and scenarios, and test them out or picture the more cumbersome tasks when inside a truck camper. In larger rigs it is less an issue, but with a slide-in it is easy to fall into the trap. I am "complaining" from a high level. I am picky, but my use case is for longer term travel at a time and I did not expect this - so, my frustration is probably a bit higher. I pictured myself doing work and other things and it is not enough.
The Supertramp is of high quality. I did not have any issues. Everything worked while I had it. It is comfortable and beautiful. There is a great team behind it. They are trying hard and they are listening to their customers. I definitely pushed the boundaries a bit haha