I think the worst thing they do is ask you to connect with your email account and then they continually spam your contacts to join LinkedIn. It's bad, but they're not the only ones doing that.
Interface-wise it's not that bad, but I don't use all the features (free user) and don't spend much time on there.
Interface-wise it's not that bad, but I don't use all the features (free user) and don't spend much time on there.