There are two ways to use a mulching mower,the right way and the wrong way,but the benifits are well worth it,greener/lusher lawn and NO thatch and best of all no carting around 100s of bags of clippings that cost you $$$ at the tip,wouldn't you prefer that money in your own pocket?
Each time that you catch the grass not only are you stealing its food but you are also stealing its "blanket",remember back in the winter with the yellowing from the frost bite on all those caught lawns? never happened to me,all mine where snug as a bug in a rug! with mulching you are giving the lawn a feed,leaving a nice warm blanket on the lawn that is like a sheeps wool,cool in summer,warm in winter,it not only traps water by acting as a mulch it keeps the lawn cool and protected but is invisible to the naked eye,sorry have i rambled?