I had an amazing experience with 5G home broadband in the UK...while it lasted. I paid £29/month and always got the promised 300+mbps (sometimes up to 500-600) down with ~10ms ping. It was 100% rock solid and seemed to be truly unlimited, e.g. in the first month I downloaded >500GB and never noticed any throttling whatsoever.

Then they took down the tower nearest to my flat for "improvements" a couple months into the pandemic and from then on it basically didn't work at all (it was supposed to switch to 4G and it theoretically did but the best I got with that was an extremely flaky 10mbps). They originally said it'd be fixed in a week but it was completely unusable for at least a month. So now I'm back to a cable connection.

I still miss the 5G though -- there was something pretty amazing about just plugging it into the mains and suddenly having super-fast wifi with 0 installation. I personally remain optimistic about its future, unlike pretty much everyone else in this thread I guess.