Hi I would be a bit concerned with some of the claims made by the above linked maker.
The trailer axle is made of 50 x 50 x 5mm RHS. This is much lighter than a solid axle, and less likely to bow, buckle, and break. To the best of my knowledge illegal in many states.
# The tent uses spring loaded push button extendable poles, which makes it even quicker and easier to erect. Pain in the butt to use and next to useless on sloping sites.
The colour combinations are designed carefully by using darker colours on the roof to block radiation from the sun which contributes to the high temperatures in summer. During winter, the sun's rays cast mainly on the walls of the tent. The lighter wall fabric allows more radiation to penetrate so that the tent and annex is warmer than those with darker wall fabric. (For a more detailed description (and illustration) of how this works see the Temperature Control section). So our tents not only look great, but provide superior performance also!!!
Bit of over selling I think. Last time I checked darker colours absorb more heat radiation than lighter colours, so the roof will be slightly hotter if darker and from memory the sun still goes up and over in winter.
When checking second hand campers ask the seller to put the tent up with you there and let you hose it conciderably to check its water proof. Be wary of cheap trailers, look to see if the trailer has a chassis or if it is just angles welded together, also try to find one where the draw bar is welded back to the spring hangers for stretgh.
We have a pull out stand alone kitchen and my wife loves it, no more bending over to cook or do the washing up.