I switched to One.Tel for phone calls about six weeks ago and, so far, am very satisfied with the StandardUKTalk service.
Even more pleasing was that I was initially provided with £20 credit for calls and still have £15 remaining - I reckon it will take another four or five months before I actually have to pay a phone bill to One.Tel...:-)
So I would be quite happy to seriously consider its broadband service if I ever decide to make the switch.
My other half, after I had printed off One.Tel's first phone calls statement, immediately queried why every call seemed to cost 48p?
I had to gently point out that this was 4.8p - the cost of the connection....