child trailer

Burley seems to be the main internationally available trailer
manufacturer getting mentioned.
There seems to be very little mention of "Chariot carriers" child
trailers (the CTS range) and nothing about the zwei-plus-zwei offering
(Kiddy Van in particular). These are the main ones my local cycle shop
offers on order. Is anyone out there using these who could comment on
their quality/value ?
Of particular interest is speed of folding/unfolding, as we will need
to do this every time we use the trailer (it will sleep in the narrow
hallway with the bike!)
Cheers,
Matt