We have the J-Cubes and they are great -- when 2 of them are put together they fold out to about the size of a king size bed (we've actually had 4 smaller kids (5-6 & 2 8yr olds) sleeping on them at one time side-by-side -- can't do that with a trundle:wink
. Only had them for 1 season, so not sure what the longevity is - the inside is foam so may "squish" down over time, we'll see.
2005 Ford Excursion (4x4 Limited, 6.8L V-10 Gas, 3.73 Axle Ratio, E-rated Tires)
2013 Jayco Eagle 314 BDS (Outside Kitchen, Hide-A-Bed, 15k A/C, 50A Service)
Husky Centerline WDH (1400#)
DW, DD x 2 (10 y/o twins), DS x 2 (8 & 6 y/o), and "Oscar" the Weiner Dog