Not personally, but I work in a new building that has same style rain handlers, and I sit just inside from several of them. Things I have learned about them from that:
-Your windows will get quite wet if the wind is blowing while it's raining. So will you if there is an entry door under them.
-Birds like to sit on them and take bird dumps
At home, I suffer with gutters and do not have either of those issues and I just finished taking care of what, to my mind, is the biggest downside to gutters: Clogging/cleaning. I now have the stainless, very fine mesh gutter guards from Costco installed all the way around the house. I put them up first on the garage gutters a couple years ago and they worked great, so this month i did the rest.
At work I cannot tell how well they actually disperse the water, but they put a four foot wide rock border under all of them, so maybe they know something we don't.
Hope this helps!