Hi,
I really hope i'm not too late!!
Do you play games at all? if you play any type of games other than maybe rpg's avoid virgin media like the plague!! My girlfriend got us migrated to it a few days ago without telling me to save £10 a month (

) and its absolutely terrible.
250ms ping times at anything resembling peak times (including right now @ 12:35) making games horrible, even gf's lagging on wow (serves her right!!

). Max download speeds = 25k/sec on a supposed 8 meg line making even browsing extremely annoying. I'm not daft and its not a problem with my router etc etc, i've had various isp's previously and this one is just screwed, do a google search "virgin media ping times" and find a LOT of complaints of the exact same thing.
I rang them up today only to get through to an extremely intelligent woman who informed me that "some xbox live players have been complaining that the ping times are too low so we have now made our pings higher and now we're having people complain about that too"
She then put me through to cancellations, i explained the problem in pretty much these exact words "Migrated to this service a few days ago, its utterly useless for anything throughout the day, i want a code immediately so i can change" and the way he responded was as if he'd had 10 similar complaints the same day!!
Please do yourself a favour and don't get virgin media if your reliant on the internet!