Used them on a recent 4 night camping trip and they are great, thoroughly recommend them
They are really comfortable, sort of firm-ish but quite giving as well, the memory foam really helps on my hips as I tend to sleep on my side. We strapped them both together with the straps and poppers that are on the side of each Dreamtime and then put a Kingsize cotton sheet over the lot. Worked a treat and we had a huge bed! Great for when our 1 year old crawls in between us at night and also pretty robust when the older boys were bouncing around in the morning.
The pack size is pretty big but probably no worse that a lot of camp beds. I was also toasty warm, much better than on our old, cheap airbed.
If anyone is considering these and happy to shell out the upfront cost then I'd highly recommend them.
We got two DT XL's back in 2008, and have used them for our fortnight campings in the South of France during July 2009 and 2010.
They are for sure the muts nuts, despite the cost, we added a bespoke made fitted top cotton sheet, and just use a Queensize cotton sheet for on top of us.
For extra warmth if needed, we also have a Netto £6 KingSize 5 Tog Duvet, c/w cotton cover, although have only used the Duvet in anger the once.
Like you say great kit, and I would describe the DT XL as more of a sleep system than a SIM.
------------- Hypercamp Alaska
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Vango F10 Helium 1
Coleman Cobra Pro 3
Coleman Cobra 2
Naturehike Star River 2
Eureka! Solitaire
Dutch army goretex bivvy bag