I was disappointed in a chain that was recommended by another store, I mixed chain with cassette only because of the quick link on the chain I purchased at the time. Shimano now offers a quick link, thus I replaced my old chain with the Shimano and the chain made a noticeable difference, less noise and cleaner shifts.
I'm a big boy (245 lbs) and usually ate at least one chain per season if not two with Ultegra 10 spd chains. After upgrading to 11 spd Ultegra and chains I now get about a year and a half to two years from the newer Shimano 11 spd chains. Articles suggest using these chains for 10 spd drivetrains as well because of their superior construction, materials, and longevity.
This chain include a quick link for connecting the chain, not the usual connecting pin. Unlike quick links made by other manufacturers this one seems to require a special tool to secure the connection. I tried pulling on the chain which works with other brands but I could not get a connection that didn't simply fall apart when the tension was released. Why couldn't they have included an old fashioned connecting pin that requires nothing more than a conventional chain tool?
As a heavier (190lbs all muscle) cyclist and the fact that I ride a lot of steep hills I tend to go through chains a little faster than the average person. This chain hold up well and I would recommend the Ultegra or the Dura Ace chain. If money is tighter go with the Ultegra.
I like the smoothness, durability, and price of Shimano Ultegra chains. This one came with a quick link instead of a breakaway pin. Once I figured out how to install it, it was easier than the pin. You don't need the pliers. Just line up the link, and put pressure on the cranks to snap it into place.