Thank you Sir for the detailed explanation! I appreciate it. See, I would've thought a chain tool and pin would've been in a bag or basic tool kit. Although, it makes sense now especially when I was researching group sets and found out Campy's chain tool was nearly $200!A link makes it easy to disconnect and reconnect the chain. Otherwise you would need a chain tool and a new link pin, (which presses in with the chain tool, like a rivet). Once a pin is removed it must be replaced with a new pin and pressed in with the tool. For example, when installing a new chain you need to size it first, install, then connect. The link makes it easy. Go to the Park Tool web site for instruction videos.
A link just makes it easier. I have found it wears about twice as fast as a chain, so I normally replace the link one time without replacing the chain.
The Ultega 6800 11 speed group needs a different chain tool to reconnect the chain than the 10 and lower speeds. Also the hub on the rear wheel is larger than the 8-9-10 speed hubs.
Thanks. I will keep an eye out for a link when one if/when it becomes available. For now, I will most likely get the Shimano tool (TL-CN28). Lot more reasonable in price than Campy $200! I can see the advantage of having such a link.On my non 6800 chains, when replacing the chain I would size it down using the chain tool, (which comes on some multi-tools for far less than $200), put it on the bike and connect the ends with the link. The 8-9-10 chain tools should be able to push the pin out of a 11 speed chain, at least I've read that, but cannot install a pin, hence having a link would be nice. But, as of now, there isn't a link that fits the 6800, at least as far as the link manufacturers say.
If they went through the hassle of printing it on the packaging I'd say so. Note that it's not reusable so it doesn't allow easy removal for cleaning of the chain.I'll take that as official news, the KMC Missinglink I installed is compatible.