Yeah I've used it for a long time but not for its commit graph feature, which still isn't as nice as Git Graph. Actually the main feature I used it for was "Compare working tree with <commit>" which gives you a nice "what have I changed overall" view but one where the files are editable still in the diff view.
However I found this better extension for that: https://marketplace.visualstudio.com/items?itemName=letmaik....
So I don't really need Git Lens any more, which is good because they've made it all commercial and annoying.