Hi
I have been a Homechoice/Tiscali customer for about a year and i find the service great, thats not to say that if I could get cable I would have tiscali but as it happens i cant get cable or sky so tiscali was my only option.
You can not get a hd box yet only certain peeps have them as they are still on trial.
Multi room is a no no, if you want it you need a second phone line and whole new contract with tiscali ( I no I tried)
The broadband is v good (for me) it never drops below 4 meg (although I pay for UPTO 8 lol

it usally sits at 6 meg which is fast enough for the 3 quid they charge onto of the service.
On the 8 meg BB I dont notice any real slow down when watching vod but I did used to get a lot of slow down when I was on 2 meg.
I download about 30 to 60 gig a month and have never had a cap for it.
The tv service is good and the VOD uis a great idea and gets updates reguarly the only downside is the pic quality on some of the channels as it can be a bit below average but they say they have HD comming soon

.
Yet to see that though.
I download all night long most nights and have no issuse.
Hope this is of use to you please dont think I am a tiscali fan boy its just that I dont have the choice of anything else so for me its a god send and tbh most tiscali customers are in the same boat as myself and dont have the choice.
Cheers Darko