Hope this might help you
I'm in a rural location and no national broadband rollout here yet meant I explored alternative options.
For the initial 18 months after moving in, we used a three Sim (all you can eat data) for 20 euro per month in a 4g router bought in Argos for around 100 euro and positioned it in the attic.
Coverage is very poor here generally but actually up the extra height of the attic we were picking up coverage.
Netflix worked well enough, the very occasional buffer but mostly solid performance.
General browsing all ok too.
Heavier things like updates and streaming live weren't great.
Speed test was showing low sub 5 meg on average download, upload a little less if I recall correctly.
If I was going through it again I'd test on a sim in a phone in the areas around the property including the attic. Do this before buying the router. I discovered the attic coverage by accident, just up there one day doing a bit of work and notifications started coming in.
For 20 per month it was a great option for us when stuck with limited options.
More recently I got Starlink , night and day comparison. Easy setup and I would recommend it.
Also 3 times the price but worth it in my opinion as the connection is above 75meg download mostly and upload is 10 to 20 meg on average (at least when I've tested it)
No performance issues as of yet, no buffering or outrages.
Multiple users and live content streams without issue.