I've been with virgin Media (Blue Yonder) cable service since Red Hot Ant decided to shut up shop in 2001. Obviously, speeds have increased over the years, started off with 512Kb/s through the free upgrades to 10Mb/s. Over all this time, I've always received the download speeds advertised except the very few times when I've hit the traffic management limit.
A few months ago, I upgraded to the 50Mb/s, obviously at extra cost, and I get the full advertised speed. Now, VM are bringing in a 120Mb/s service. All customers currently on 50 100Mb/s service will be upgraded to 120Mb/s. %0Mb/s customers apparently won't pay any more, and 100Mb/s customers will see a reduction in price down to the 50Mb/s level.

In all this time, I've lost broadband connection only about five times, but the email system goes down on a regular basis. Unfortunately, getting hold of customer services doesn't usually get you anywhere, as they say they don't know of any problems, and they try and convince you it is your equipment at fault.

Other than that, I'm very pleased with the service I've received over the years.

EDIT: VM have decided in their infinite wisdom to introduce traffic management on the 50 - 100 - 120 services. This, of course, makes a difference to the value rating, so I've reduced the value rating from 10 down to 7. With speeds of 120Mb, it will only take around 35 minutes to hit the 'daytime' limit, and about 18 minutes to hit the 'evening' limit.

VM promised a while ago to change the way the traffic management affects our speed. It was limited for five hours from hitting the limit, and they said when it was revised, it speed would be reduced from when the limit was hit until the end of the managed time, which is 3pm for the morning session, and 9pm for the evening session. Unfortunately, they seem to have forgotten that idea, so you are still traffic managed for the full five hours if you hit the limit.
At least the morning traffic management only cuts your speed by 50% instead of 75%, but the evening session is still 75%.