Works well functionally (shown with a 12 mattress on top and 8 mattress on trundle) however, the slats are simply placed into shallow slots in the wood which doesnt allow for any kind of easy movement. This system works for the trundle but I have already had the slats fall out when adjusting the mattress.
I wish there was a small lip to help hold the mattress in as well as it tends to slip around.
Wood appears to be poplar as theres a ton of colour variety (greens, purples, browns).

Its certainly not bad, just feels a few tweaks from being great.