If you are a head hunter, you might be interested in growing your own network...
A finding of an HR professiona,l a head hunter in Hungary, is that if one uses Linkedin's own Recruiter and visits your profile, you are going to see in your "Who's Viewed Your Profile" a 100% anonymous Linkedin Member.
So I think from the above mentioned growing your network vs. being invisible, I'd rather not use Recruiter. If I was a head hunter.
For recruiters though this is a great tool.