I have NTL and regardless of bad press I am very happy with it.
It will give you more than Freeserve if only that you can choose from 128Kbs,600Kbs(not 512Kbs) and 1000 KBs.
I have just dropped from 600 to 128 as I have just been made redundant and cannot afford the £24.99 so have opted for the £14.99 for the 128.
Obviousley you can choose which is the best for you? depending on the amount of downloading you are going to do.
freeserve does not give you this option.
Hope this helps,