Just a heads up.
I have broadband only and was part of the Stream trial. Hence the Stream box was attached to my contract.
My contract is up next month. When I rang yesterday to renew at a similar price to what I was already paying, I was told there were NO discounts available if I had Stream on my account.
I've had to cancel my Stream box (and send it back) in order to get similar discounts to what I had on my last contract.
Keeping Stream would have cost me around £20 extra per month (I rarely use it anyway).
Might be worth taking into account if your contract is up soon.