Shambolic.
From a recent experience with a member of the family, although they set the line up quickly it's currently yielding a 0.3Mb uplink speed and 0.16Mb download speed.
They've been "investigating" for 4 weeks and despite ADSL normally offering a higher downlink speed than uplink, and the same line previously achieving 2Mb download speeds, they have as yet, not fixed it.
Their tech support is utterly useless – they ask endless detailed questions which when answered go unread – they just try and close down tech support calls irrespective of whether they are resolved.
I'd say they are marginally better than TalkTalk but not much – and that says a lot.