Just upgraded to fibre optic with talktalk.
After 3 days of problems with the connection I can finally use it today.
Its awesome. So quick. Its lovely to be able to upload large videos to you tube in minutes instead of hours.
The only thing I would say is if you want to consider it, it might take a few days to work if the connection isn't setup correctly. Maybe something important to consider if a connection is vital for work etc.
but now its working its great. Skype video calls are much better quality. As that's our main way of communication, it was hard not to have a connection for 3 days.