I sure do. Mine works very well. The baffles and hardware stay very clean compared to the mulching kit on my 60" mulcher on my retired 445. Even though I have not removed the baffles, the installation looks very simple using few bolts and wingnuts. The plugs on the new kits are all plastic, which is a good thing. My old 60" kit was harder to clean and therefore beginning to rust.
Mine has a tendency to leave a thin line of mulched clippings on top of the grass in a very light stripe from right under the middle of the deck. The mulched clippings are fine enough that they disappear within a few hours.
The key is to make sure you are mowing no more than 1/3 of the total height of the grass. Also, that the grass is dry. I cut my tall fescue at 3 1/2 inches this time of year and it's doing a great job. Never any windrows or clogging. The engine has never even thought about lugging even when I've let it go a little too long. I once HAD to cut my grass when it was very wet (right afer a rain, going on vacation early the next morning) and I was amazed at how it handled it.
Bottom line is that it is also healthy for your lawn because the finer clippings decay rapidly and do not mat-up with the natural thatch like normal-sized clippings