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Thumbs up or thumbs down?
Have not used them personally, but my LBS HIGHLY recomends them. They try and push them on anyone that comes in saying they want to do a tri! One of the mechanics there, who road races, loves the bars. When I asked why, he said they get him really low, and are fairly light, but you probably already knew that. Sorry that I could not provide much more than this.
Thumbs up. I have combined mine with the Deda Aeroblack base bars on my Kestrel 200sci. Yes the alloy bracket is pretty ugly, but no-one looks at that with all the carbon on display. The good thing is the combination with a magnesium stem is v. light and handles well with no flex when pulling up on them on a climb.
The only problem is if you wish to mount a Jetstream type drink system.
Coolio.
Natatorium = swimming pool?
Yea, Natatorium is just a fancy word (often used in academia) for swimming pool, indoor swimming pool if you really want to get technical.
Thanks for looking! 
Anyone else have a local “Natatorium” still around?
I generally think of Natatorium as the facility or room that the pool is in, not the pool itself. Similar to the football stadium being where the football field is.