They're all pretty shit, but PlusNet is the one I use as well. Their customer service has suffered a bit lately, but at least it's not as bad as TalkTalk.
I'm still on their PlusNet Value service. They don't advertise that anymore, but they better not fucking move me from it!
It's difficult to get cheap packages like that these days. Now every ISP insists you take out line rental with them as well. That shite shouldn't be forced on customers