I do. Best idea I've ever had! My bench downstairs is now way to the rear so I have full access to the wardrobe next to the fridge and even the cupholder with 12v outlet is completely uncovered. The space in the van is now huge and it doesn't feel so cramped anymore. I moved the portapotti from under the sink to the boot, there is still enough space for it and a portable external gas cooker. So roughly 50cm deep. The advantage here is that I have more space obviously for food and kitchen stuff without having to play tetris every time. If I (my daughter) need/s the loo during travel, I slide the bench fully forward and I can climb from the side door behind the bench into the boot and use the toilet. during the night the PP comes in the front since I have plenty of room now.
For 3/4 days weekends I still have enough cargo space, considering I'm hauling a scooter for the daughter, a box full of lego, the safetynet for upstairs, a contraption for the heating, a shelf to hold an electric heater upstairs etc.
If I need more space I just slide the bench a bit forward according to the need. In summer I'm fully loaded with big Quechua tent, inflatable 3m boat, pumps, additional table, awning carpets you name it. Once in situ and offloaded, i slide the bench again to the rear. Only downside you need to have the headrests hanging in the boot.
Also if you have to eat inside with the bench in that position it's a bit dark on the table. I solved it plugging a USB lamp with a long cable on the cupholder socket next to the door and hanging the lamp to the roof/bed using a thin thread.