Depends of if the grass is wet or not. Wet? It'll clump. Dry? It'll leave a streak. If you're using a OCDC to keep the clippings out of beds or off the house, then that's what it'll do. You'll just have to deal with the drawbacks. I've got a lazer too(52") and I had a mulch kit on it for 3 weeks. Took it off as I really didn't like how it limited me. Added the OCDC, a Jumbo catcher, or when I have to, the Ultra-vac, and I can do everything I have to wothout too much fuss.