I am not experienced with many types of bikes or groups, so take this for what it's worth. But...
I have had a triple 105 for the past four years, and I really do not have troubles shifting. Nor do I feel like I have to take my bike in to the shop a lot. I ride a lot of hills, both grades and intermittent hills, and for whatever reason, I just don't have trouble with chain drop or missed shifts very often.
I think, for me, it has come down to *how* I shift, such as when I ease off the pressure momentarily, or anticipating which chainring I need heading into the hill. I almost never change chainrings mid-hill.
Anyhow, my 105 triple seems to work well for me. But then, I may not know what I'm missing!
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury