I used gator blades and discharged for a couple years. Went back to high lift last year.
I also only run them now in the fall.
If you are cutting the grass ever week and only cutting less then a inch off the top and the grass is not wet then they work good.
They are made to toss the grass to the center of the blade so the grass gets cut about 4 times. If the grass is wet it just clumps up and throws out big grass balls.