We've only had this for a short time, but so far it's ideal for our purposes! We wanted to have an easy to store solution for sleeping in our crossover vehicle (2016 Mazda CX-9) and the twin XL is the PERFECT fit. When the second and third row seats are folded flat it fits between the wheel wells in the third row and extends all the way to the front captain chairs. Where the backseat is wider we put a firm king size pillow on each side and we can both comfortably fit, laying flat, to sleep. The foam is thick enough that we don't feel the cracks between the seat rows, but thin enough that when it's folded up it fits easily in the trunk space when the back seats are raised. We're looking forward to car camping with this next summer!