Most of the mdf i'm seeing is backer boards. The main crossbeams support the weight. Its more than stout enough to play ok. Most all home tables share this const. style. If i had room i'd snag a deal like this.That is a lot of MDF under that table supporting the slate.
Not a Gandy or a Connelly. Its an import of some kind. The underneath pics look exactly like the vast majority of import stuff.Possibly a Gandy.
It looks a little from the side of the table as a Connelly The Ultimate, but those have 2' four piece slate.