For me it was ok, but real life meters wasn’t exacly as good as lab test.
Please, don’t get me wrong. It works and Google doesn’t punish. But any of Discourses isn’t blazing fast. Forums are fast enough — not totally same thing.
And if a site has content and some functionality, achieving good results from real world is a bit harder job. Again: good results is an idea that has little common with experience of an user.