Do you mean https://www.google.com/webmasters/tools/ ?
Your link just forwards me to Google.com
Does any one use that? Does it help?
Helps change the crawl rate too.
Yes I'm using it, it helps crawling my websites and finding wrong URL's. And there are tons of other benefits for it too so yeah
Ow the major thing is that it's free, so why wouldn't we use it than!
I am also one of them thousand's of users, it really does help crawl sites and generate the sitemaps