Some promise, but many things are broken at LinkedIn
The LinkedIn implementation does show some promise, but has many broken aspects, especially that lame "Endorsement" treachery they set up some 6 months ago. Stupid Move, CEO Jeff Weiner! We get what you're trying to do, but you are offending us users that way!
It's also wrong for LinkedIn to inject a company oriented advertisement block *anywhere* in the list of our past jobs, because it wrongly gives the impression a person has worked there. Stupid and wrong again, Jeff!
Also, it is irritating the way when I attempt to make initial contact ( say with a long-lost colleague who was also a friend) I have to specify EITHER "Ex-Colleague" OR "Friend" ... and there are only 4 or 5 options in that list. After all, many colleagues were good friends before company implosions sent us to the winds. That option list needs a little expansion, and needs to allow multiple choice, and even a new entry field we can fill in ourselves.
Finally, the LinkedIn on-screen organization is just messy. You younguns who grew up on Facebook probably feel comfortable there but we businessmen want quick, clear, organized tables not splashes of info all over and all mixed up with adverts. I acknowledge those adverts pay for the free access we have, but if LinkedIn is targetting us business types please clean it up...or perhaps let us pick our own "theme" or "layout" to suit.
Bottom line: In principle I do like LinkedIn, but in practice they have lots of ways to improve;.