I love the maple color. The delivery was timely and it was easy to assemble. The trundle pulls in and out with ease and looks at place with the rest of the daybed. 

The back does have an opening but it's only 4-5 inches so a super tall mattress is not needed. An extra long twin sized mattress however IS needed for the top and regular twin for the bottom. 

It's pretty sturdy so it's good for everyday use. It is a bit tall though so bare that in mind. I would also suggest a bolster and some pillows for added back support.