Seems pretty good to me. No fixed term unlike most other providers who are 18/24 month contracts. Price seems to be among the best for a phone line and fibre. No connection charges either.
"Our 17 range Phone and Broadband package contracts are non-fixed term. This means the contract continues on a rolling basis and will continue until terminated by either you or SSE in accordance with the General Terms and Conditions for the supply of Phone and Broadband."
Only for SSE Energy customers like me though.
This linkseems to suggest they are quite highly rated according to Which.
If they turn out to be no good then I can leave (but you need to send the router back? they send you a pre paid envelope) so they've got it all to prove to keep my custom!