Background info: When I bought my Burley Canto, I spec'd out the shifters and rear derailleur because I was not enthusiastic about what Burley put on these models. So, I used SRAM X.9 grip shifters and a SRAM x.9 derailleur.
Recently after receiving some birthday money, I decided that I wanted some trigger shifters that SRAM makes for the X.9 family of components. So I ordered them from JensonUSA. I put them on myself. I had never done anything like that before then. I was quite happy with myself.
Anyway, I have used these now about a week and they are perfect. The shifts are precise and quick. Plus they are simple to twist even in a pouring rain (something I had trouble with with the twist kind). The shifters even came with cables installed and coated. The cables were long enough for even the rear derailleur. I cannot say enough how awesome these are. If you are looking for a good shifting upgrade, you should definitely consider these.