I have both the DA and Ultegra 10-speed versions. I don't "hate" anything about either, but I'm not crazy about:

- lack of obvious "click" when you press a button
- not great in the winter when wearing thick gloves.
- I have the original software, so I can't shift multiple cogs by holding the lever. I do a lot of "shift-shift-shift-shift-" stuff
- Wish I could go to a 30-tooth cog on the rear
- Wiring is pretty messy on bikes not designed for it