While $115 may seem expensive, try accurately boring a grid of 20mm holes on 96mm centers in 3/4 MDF. I have for a table for our retirement community shop - - its a pita. Plus the MFT material seems denser and more water resistant than garden-variety MDF. And the single-thickness has proven sufficient the last several years on my original 1080s. Still dead flat.
While a strict figure for the bench’s weight capacity is not available, a quick browse through their other stand and bench products shows a general weight capacity well above most other brands. As such, while we cannot say for certain that this bench provides the best weight capacity, it is more than likely that it the capacity is similar to the other products in the catalog.