I would imagine this rightfully earns its poor reputation considering it is relatively useless out of the box from the company
The problem with skilter filters is the same problem with most filters in general - poor engineering and slick marketing. There's no reason you couldn't build a skilter with good operational efficiency. The problem is, nobody does this.
Any really good skimmer with a gravity fed box filter attached to the outflow would make a good skilter. Considering that most filter makers are more concerned with selling those worthless disposable filter replacements vs making a decent filter makes this next to impossible from a marketing standpoint.
*All* venturi based skimmers in my experience are inadequate. A 2litre Coke bottle with the bottom cut off with an air stone shoved inside is a better skimmer than 95% of the skimmers on the market.