I looked at them before , and at the way cheaper camp beds from big superstores
My findings based on a generic higher one like this
Heavy Duty Outdoor Folding Camping Bed Portable Sleeping Cot + Carry Bag UK. COMFORT: Cot Size is Optimal for Most People, Your Arms Can Stay in the Bed Without Crowded Feeling. 6 Anti-skid Feet Make the Bed Stable Without Wobbling.
www.ebay.co.uk
Hxx Length assembled 211cm
Generic Length assembled 191cm
Hxx Width assembled 66.5cm
Generic Width assembled 62cm
Hxx Height assembled 38cm
Generic Height assembled 42cm
Hxx Length packed 59cm
Generic Length packed 191cm
Hxx Width packed 18cm
Generic Width packed 20.5cm
Hxx Height packed 18cm
Generic Height packed 10cm
Hxx Weight 3302g (packed) 7.27lb
Generic Weight 5400g (packed) 11.9lb
So other than the pack size and weight they are pretty similar
Findings in use
So i took a gamble on one of the generic ones from Tesco it was end of season clearance so £15
First impressions wide and heavy
Initial assembly was fun, super stiff fabric needed a bit of oomph to stretch into position
Assembled - super stable and rock solid
I have a low cot - not Hxx
A generic cheaper copy
The low type clip together bed, got used once,
the only way i could use it without collapsing, was to roll onto , and off it , and hope i was in the right position
as trying to shuffle up or down just made it collapse
Camping
They take up a lot of real estate !
I have a Kyham biker plus tend which is a big tent,
But the one to take into account is the inner tent, that's where your cot is going to go
The Khyam inner is 220cm long by 180cm wide
But its not a cube, it gradually curves from bottom to top !
In real world use the generic at a supposed 191cm touches both ends of the inner tent , i tried turning it to fit diagonally, but its a faf
now I just let it touch the ends of the inner tent . it's not as if its every day, it two or three camping trips every year
Comfort
Once the fabric stretches, the creaking stops

as comfortable as a normal bed,
with the advantage that if you want to shuffle up or down the bed, the legs aren't going to topple like dominoes ( a fault on the cheaper ones )
Being the slightly taller unit, your literally feet on the floor and stand up , no rolling onto the floor and then shuffling up
Set up
Take out of bag,
Unfold two legs
Open bed
Feed end tubes through each end
Clip into longitudinal tubes
Done
On bike
On a GS with vario panniers in the unexpanded setting the overhang side to side is about 10cm - so 5cm per side
Still not wider than your bars