Great upgrade — totally worth the cost, wouldn’t go without it
The LunoLife mattress is all that and a bag of chips — extremely comfortable, perfectly fitted to the interior of your car so you utilize every bit of space, and due to the two-separate-sides construction, when your partner (or large dog) rolls over/moves around you don’t bounce up to the ceiling. (Also, a thick comfortable overlay means you detect zero crevice between those two sides.)
That said, the fitted sheet takes it up a whole ’nother level. Extremely easy to put on (not like a normal fitted sheet) and makes the surface super soft and comfy. It manages to be cool to the touch when it’s hot yet add insulation and warmth factor when it’s cold. You don't need anything else under you so no need to struggle with other sheets — you just turned your (very comfortable) air mattress into something even better.