Not I. I hated bar end shifters.

My husband likes them but with my smaller hands I could never keep proper hold of the bar while manipulating the lever. Trying to shift under ultra low speed or high speed conditions was always hairy.

I also like the snappiness of brifters (having nearly rear-ended multiple people with bar ends who've lost their "mo'" on rolling terrain) because your hands are almost always positioned for an immediate shift. Bar end shifters themselves aren't slower shifting but the rider has to have her hands on the shifter ahead of time.

For loaded touring in the back of beyond, bar ends would be more serviceable, but it's not like we wear out brifters very often. We do ride Campy which are re-buildable but the parts aren't exactly stocked by every LBS.