Happy with this purchase, especially for the expense. I have a King with an adjustable base and needed to loosen the headboard screws to allow the base to rise, however, still sturdy and functional. With the adjustable base I didn’t need the slats - sink can’t speak to those. I wish the middle supports on the sides  (joining the head and footboards) was less obviousnot as wide. I’ve hit my foot on it each time I went to bed for the first week - however, I’ve adjusted and seem to have trained myself to not step into the middle)
Personally, I wish the headboard with a little taller but that’s my preference, not an issue with functionality.