Ive found in my experience of various TT customers,
1) port throttling on gaming ports
2) Frequent disconnections - not losing line sync just getting disconnected from the network 6-10 times in an evening - this totally ruins any online gaming.
3) Very heavy P2P throttling - just dont even go there you'd be disappointed.
In short, TT is fine for the Wanadoo or BT Basic crew or even people that are using the internet for the first time. However if any of the above is relevant to you, I'd go look elsewhere.
How many times do we have to say it - 'You get what you pay for.....'
Plusnet Premier 2Mb ... zoom!
834G Router + too many pcs