Awesome wood bed. Just what I hoped for. The wood does appear lighter in reality than it does in the add ... more of a natural pine color than Scandinavian oak. But for me that is a bonus, love the natural light tones.
On hardwood the trundle rolls smooth. I (one female) put it together in two hours with no problems whatsoever.  Just look over all pieces in instruction booklet and follow directions and if you can follow lego instructions, and use a power drill, you can do this no problem!