Currently with Vivaciti, just moved from their Enta-supplied ADSL Max to ADSL2+ LLU ("Surfwise Variety"). Not massively impressed so far, only been on it about 26 hours and already experiencing line drops (2 in the last hour).
Spoke to their support today, they claim there is a line stabilisation period of 10 days. This is in direct contrast to someone at Vivaciti I spoke to yesterday who categorically said no such thing occurs (I asked the question directly).
Is the stabilisation thing true? Not massively impressed with the speed either, although it is a bit faster than what I was getting before.