My son installed the trundle bed in about 2 hours - not complicated - I helped for small things
The color is nice ; the mattress in the picture is 8 inch - it can go up to 10 inch as mentioned by the vendor
The trundle bed is on wheels and completely detachable , it is not attached to the main bed as the customer service representative told me
Being on wheels , I have to find a way to block it from moving