I've never tried this one specifically, but did try another one many moons ago when I had my 55. I thought it would save me time as my arms did not reach the bottom of the tank so I always had to use a chair to clean. Anyway, it sucked. No pun intended.
Like others mentioned, the mesh on the bag wasn't tight enough, so whatever went in it and was already fine in texture would go through it and make a even bigger mess than I started with.
Plecos are big poopers, so the bag acting like a strainer may not be a issue, but I can't say that I'd be willing to fork over the cash for another one regardless of the brand name on the box.