The 30's do mulch well. If the grass is high and wet I haven't found a mower that does mulch well, including the 30's. What we do if the grass is high and wet we side discharge at the ht. we want it at and then go back over it at an inch higher mulching it. It works well. At times you do need to scrape the deck more often then I would like to. I personally would not get a mulch system put on it, because I like the freedom to have all options discharge, mulch, and bag. I think that is the mowers strong point. That was something I did not like about the walkbehinds and riders. I really try and stay away from bagging. That is why I only will take lawns for weekly cuts. After the spring crazy growth we mulch most of the time.