This trundle fits under our bed with ease and rolls in and out nicely.  I thought the assembly to be a little long, but not difficult.  The jury is still out on longevity as I have owned it for such a short time and I do not know how long it will last.  The metal should hold up, but how all the support bars are held in place feels a little cheap, and only time will tell if it is a good durable design or not, let's hope for the best.