We did it!
The last stage was to put the car together with all the finishing touches. This meant adding the pre-cut foam, the lighting, bedding and storage making it just right for us. The car needed to be dog friendly so we ensured we could make the front seat convert into a comfortable little bed for Pepper at night (we essentially used a cool box in the footwell so it was the same height as the chair and lay her bean bag across the top which gave her plenty of room to sleep).
The bed itself was actually pretty comfortable. We were really chuffed to have used foam and not an air bed as it was far more durable and felt like a 'real' bed. The width of our bed was about the size of a 3/4 mattress so we could both comfortably fit without being too close as it was quite warm at night. We solved this by keeping windows open, blasting out the AC and keeping our windows blacked out so it could remain shady in the mornings.
Under the bed the storage system worked well but we realised that the hinges weren't as useful as we intended. Once you have your foam on top, the bedding etc it's a pain to take it all off when folding the bed to access the storage. In the end we just mastered the shimmy and slid the boxes down towards the boot which wasn't too much of a faff.
Overall we would highly recommend using a Land Rover Discovery for some cheap camper van fun. It has the fun of a camper van without the cost. It can go back to being a car without having to remain a holiday home on wheels giving you the best of both worlds. If you want an adventure to remember, this is the one. It's worth exPAWing...