Virgin Media was once good.
But lack of investment in infrastructure and massive uptake by new customers has slowed the broadband to a halt. Their 30Mb service often performs at 1.4Mb download and just 0.31Mb upload. My mobile phone is faster. Customer service is a joke they deny problems exist and fob you off with any old excuse. Its expensive to break your(18 month)contract early. Check out virginmedia community forums there are thousands of complaints on slow speed.
At last VM have admitted a fault, its going to be fixed soon March then April then May then June now July. I wont hold my breath but will be leaving for BT Infinity at the end of my contract as will thousands of others.
Do yourself a favour give this dreadful company a miss there are better broadband providers.