Hi miles4,
Many people tend to “like” and write good initial reviews for anything that’s “cheap” soon after they purchase it … regardless of the quality or durability of the product … because they think they got a “good deal”.
You can see some comments about this foundation in this post. It certainly wouldn’t purchase it myself partly because of its low overall strength rating, partly because of the possibility of the legs bending or breaking, partly because the plastic slat holders may be subject to breaking, and partly because it has flexible slats (rather than rigid slats) that don’t appear to be very strong.
I think this would be a case of “you get what you pay for”.
Phoenix