The "mulcher" is a very specialized"
type of mowing,as opposed to "bagging",and normal "grass discharge" mowing. Your particular conditions,should determine which system that you use. If you have a clean,not too high, grass lawn,the Ninja will do a beautiful job,but in my particular use I some times,mow a common area,around,a boat launch ramp,and sometimes some vacant lots,to control weed growth,and seeding.There is "pea gravel" near the roads,and sometimes,twigs,and Hickory nuts,the "gator" seems better suited to my conditions.If it rains,and I can't get my mowing until,the grass is very tall,I will take off the "block off",and let the grass fly out on the lawn,and then put the "block off" back on,and go over it again.Very tall grass and weeds will sometimes,clog up the mulcher mower deck,and stall the engine or slip the belt,this depends on how tight the belt is adjusted.