We used the Sea to Summit SIM in place of the upper VW mattress last night for the first time whilst staying in the Forest of Dean. To say it was better than the VW mattress is an understatement, in all honesty it was in another class. Absolutely brilliant, a game changer in terms of comfort, warmth and quality of sleep. Big recommendation.
I too am very pleased with this mattress. Much more comfortable than the comfort mattress and 30mm memory foam topper I have been using. Weight is 13kg less than before which makes it so easy to pull outside for stargazing etc. Also useful to now have the boot shelf on the higher setting. Did find when the other half moves at night you do feel it more but sure I’ll get used to that. Just need to get into the habit of releasing the valves as saw the warning about leaving it inflated on hot days.
Another fan of the Sea to Summit SIM here! Tried it for the first time this weekend and it was so comfortable. Would have slept like a log had it not been for the wind trying to remove the roof.
I do find that it takes ages to inflate itself fully but a few puffs into the valves does the trick.
So much easier to store than the VW Comfort mattress + topper.
Thanks for the recommendation