I was wondering who else has had this problem. The residentials don't have a curved-in lip to the deck, in fact, it curves out. This has always contributed to lines of mulched grass falling through the gap between the end of the blade and the deck, and onto the lawn, making for a very unsightly cut. Now, this mower has the deck curved in which prevents this problem almost completely. However, now there is nowhere for the grass to fall back down to the lawn after being cut, so THE COMMERCIAL BOGS DOWN in a weeks-worth of growth..... basically almost any lawn I mow it will bog down unless I use my custom-made side-discharge (which I don't mind using except for around pools and such). The mower is putting out very good power, don't get me wrong. With the side-discharge on, it is a beast. The problem is that this deck design, believe it or not, is not made for mulching grass. Even going slow, there is nowhere for the grass to go so it slowly accumulates and stops the blade from turning. It simply cannot do it unless a 10HP motor was on there. Even then, the grass would be accumulating between the blade and the curved deck so much that it would wear out the end of the blade within 20 hours. I knew this was going to happen, but the salesman swore on his career for about 30 minutes at me that it would get through mostly any 1 week growth. The deck cannot handle it. Does anyone else know about this problem?