4 years with them was CHRONIC - would never use them again. Please beware!
Joined vodafone on a mobile contract in August 2009 and had nothing but trouble with them. Just switched to T-Mobile now and it was a very wise move.
Problems with Vodafone included: they just could not understand that I got married and changed my surname, they finally got it and then changed it back again! I changed my address with them but then they got my account confused with my mother's account - to get that sorted out was horrendous. I was due a refund - they paid it to my mother in error. It takes so long to get to speak with somebody and when I finally got through, it would be to somebody who was unable to grasp my problem so would then transfer me to sombody in England where I had to explain it all again. One morning, I spent 2 hours trying to resolve an issue with them - just as I thought I had cracked it, they cut me off and I had to go through the whole procedure again.
I've tried to sign up to online billing for over 2 years now - guess what - I'm still waiting. Now I don't even receive a paper bill, despite asking SEVERAL times. I just get a reminder to say I haven't paid my bill EVEN THOUGH I HAVEN'T RECEIVED a bill to pay it in the first place.
It all became just too much so I changed supplier and it was the best thing I ever did - no more stress, no hassle. Just friendly, straight forward great customer service. I paid an early termination fee to get away from Vodafone, it was worth every penny.