After MUCH research I chose two of these bunks.  I like that each bunk has 14 slats - some have only 7-8.  They are sturdy and my 8 and 10 year old grandkids love them.  I bought the gray finish and BE AWARE it took about a week for the paint/varnish smell to subside, so plan ahead. Paired them with 6" (top bunk) and 8" (lower bunk) Wayfair memory foam mattresses which the kids say are comfortable. I also bought low profile sheets from Wayfair that fit the mattresses pretty well. I cannot speak to assembly as I hired someone to put them together for me ( at half the $600/each Wayfair can arrange).  Overall an excellent choice.