Arrived within 2 days of ordering, superb!
Good sturdy plastic. Build as good as you'd expect from the Sylvanian brand
My daughter is generally very happy with it. It's great that you can split the triple bunk into singles or a mix of single and bunk. It comes with 2 ladders too, increasing the flexibility.
On the downside, and worth mentioning (as it caused some disappointment) is that these are small beds. They are not as large as other Sylvanian beds which means that the adults don't fit. It's not obvious from the pictures (or at least wasn't to us). Also, the description talks about a mattress and pillow. Well, they're actually joined. Ie the pillow has been formed by a row of stitching added to the mattress.
None of the negative points have lead to my daughter regretting she got it, but you should be aware when buying.