I have Campagnolo Ergo levers on my Bianchi road bike and really like them. Running the brake and gear cables under the handlebar tape makes for a very clean and tidy look. The low end Shimano groups have (or had) the cables sticking out at right angles to the brake levers and apart from looking ugly, made fitting a 'bar bag difficult. With a folding bike I think the fewer parts that can get tangled or caught when folding the better. I quite like the Grip-Shift as it reminds me of my motor bike days and using the twist-grip to accelerate!

I am of a generation that used down tube shifters so moving my hand slightly to change gear is no great deal. My Bianchi, with full Campagnolo group set, is my sport/fitness machine when I just want to get some miles under my wheels (they are Campagnolo too!). My Xootr Swift is my leisure/pleasure mobile so speed and slick gear changes are not an issue. The Xootr has a SRAM rear derailleur and 8 cogs so finding a set of "Brifters" (that is an awful word) to match may be difficult and possibly expensive.

Maybe, one day, I'll change the whole drive chain to Campagnolo but until then, I'm quite happy with what I have.