... and one set screw actually holds it in place?

I used to hate them. Early MTBs had them and it's the first thing I'd take off and throw away together with the kick stands and reflectors. But now I am doing more recreational riding on my MTB/commuter hardtail I actually often find myself resting my palms on top the my grips yearning for another hand position. I might give them a try and see...

Yes. But I wouldn't think of installing them on carbon bars. The "crush" might be too much.

Not exactly. One pinch bolt holds them in place, IME they don't have set screws.

Forgot to mention I only like mine because I hacked them down to about 2.5 inches.

If your religion forbids you to display 'the horns' or such, and you want/need the 'lump' on the ends to keep your ulnar-nerves from being constricted - and making your hands go numb - you could look into Serfas lock-on grips. They will fit the bill physically, but without being burned as a Witch.

http://www.rei.com/product/752071

I have some and like em. They give me a place a nice second position on my flats, and lets me get a little bit hunched over if the wind picks up

If the primary role of this bike is for the road, then the drop ends will be the best. For traditional "bullhorn" ends, the extra hand position is great. But at road speeds, it turns your arms into an airplow. It will slow you down.

Same! :)

I don't like them protruding over and beyond my "grab."

I'm wondering if I'm going to miss that extra inch of bar ... ?

I have em on two of my bikes. On my commuter I have the ergon grips with integrated shorty bar ends. Great for offering different hand positions. I have a set of Titec shorty bar ends on my hardtail race bike. I like them for climbing.

Depends on where you normally place your hands. If you usually have your pinky right to the end of your bars, I'd say you'd miss it... you'll probably even find it annoying - as I did when I first tried them on years ago.

These are great, and the Cane Creeks are the best of breed. You can make them work with the Ergon grips, if you don't get the ones with integral bar ends. Both products are a bit pricey, but it's a good combination, and keep your hands close to the brake and shifter levers.

I like being able to wrap my thumbs on top as well. Allows me to position my hands as if I am on the hoods of my roadie (which is the best position ever...), albeit with barely any saddle to bar drop.