My experience, of 2 full years with 5G Three mobile broadband. It's excellent, and this is the simple router with sim card, no cables installation. I'm line of sight to a mast, probably 400/500 meters distance. I used to get speeds of 100mb down, 70 up give or take, but recently it's more like 170 down, 90 up! In the 2 years full years, I've had maybe 2 instances where it's completely dropped signal, but sorted very quickly by customer care with a full reboot of the router on their side (on/off my side did nothing).
I think when I ordered it over 2 years ago it was called 3 Silver 5G or something similar. Recently when I tried to order a new version, to avail of a 50% off rate for 1 year before reverting to normal price, they wouldn't give me the same package, even though I was already using it! Really pushing their cable version. I just stayed with what I had for €39 a month, and as the contract is up, I could leave with 30 days notice, but it's working flawlessly, so I'll keep it for now.