Believe they use Daisy Group and we have some speed tests where people change the auto from Daisy to SSE and get good FTTC speeds
http://tbb.st/1435272542520945355
Of course FTTC is distance dependant, so if going from ADSL2+ to FTTC a lot depends on cabinet distance, if a FTTC migration then should be about same.
Long contract with SSE would be my concern
I'm thinking of giving them a whirl, despite the uncertainties, and perhaps against my better judgement. Have had a look through the MSE thread linked to elsewhere on this thread, and also a quick look at the HUKD thread.
I'd be migrating from an Openreach WLR line with BT Wholesale based broadband, so no issues with switching from an LLU provider. Already have FTTC too, so no need for an engineer visit - though one comment from someone in this situation said that SSE insisted on booking an FTTC installation appointment for an Openreach engineer anyway, which was then cancelled as being unnecessary a few days before the switch-over date.
The price is undoubtedly an attraction - £22 all in for their up to 38Mbps service (my line can only manage circa 50Mbps, despite the close proximity of the FTTC cabinet, so I think I'd go for the lower speed.) Worth noting that caller ID is a significant extra cost, should one want it - £3.25 a month.
I wouldn't be taking a calls package, but I just took a look at them out of curiosity...
www.southern-electric.co.uk/PhoneAndBroadband/ProductsTalk/
I see the line rental magically jumps from £12 a month for the basic Talk Weekend package (which is their most basic line rental offer), to £15 a month for any of the other call packages (Evening & Weekend, Anytime, Anytime Plus) - with the cost of those packages being extra on top of that. Not a practice I like, but I guess it's all about the headline lowest price.