...Just mount a bicycle and go out for a spin down the road. ~ Sir Arthur Conan Doyle
I have the same handlebars on both of my bikes, in carbon on the fun ride and aluminum on the commuter. The alu bars rattle a little more. It isn't major, but I notice it on crappy pavement.
Don't believe everything you think.
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
By the time you're experienced enough to get something germane out of a test ride, you won't need a test ride.
I switched to a carbon seat post, handlebars and went to 25s (at 100 PSI). I feel like I am riding a new bike. The comfort level on my bike went way up. I noticed an improvement with each change. Going from 23s at 120PSI to 25s at 100PSI was a bigger ride improvement than the carbon bars. Since all three additions were purchase on sale/clearance and cost less than $200, I consider it money well spent.
I would not have liked them in my younger, more aggressive riding days. You can feel the flex while in the drops while riding and especially sprinting. Now I am more of an endurance type of rider, comfort is king. The improvements that I noticed, now have me thinking about getting carbon bike.
As long as you don't ride them in the sun or rain, carbon is fine. In my dreams, it is always shady and 20 degrees c and I keep lapping a midget on a horse.
I have 2 sets of Easton EC90. Dropped them crashed one set and they are fine. They do dampen some vibration but they don't smooth out cobblestone if that is what you are expecting.