My last camper was somewhat similar to this - it was a landcruiser uzj100 with a custom aluminium westy style pop-top. It would have been great for one person, but was a bit limited for two people (why we switched to the Fleet flatbed). The big limitation with this style camper is that you are either using the space for sleeping, or you are using the space for cooking/dressing etc. For full on summer camping this is not such a big deal - if one person wants to make coffee while the other is still in bed, you do it outside. However we bought a camper for the shoulder season and winter, and that is when these are limited for two - you have to do everything at the same time, including midnight bathroom breaks. There is also really no where comfortable to sit/hangout on those long, cold, and dark, winter evenings.
For a single person, this style camper is workable, but for two people it is not the best option.