Do not beleive any of the 5* reviews. I was with them for 3 months and due to previous tenant mis-reading the meter there was confusion with bills. Whilst they were calculating the bill (which took 6 months for them to calculate) they continued sending me bills even though they infact were in credit to me. I am still fighting to get this credit back after 7 months. Twice I have been told that the payment has been authorised, twice I was told it was sent and twice did they clear the query (and complaint) as resolved. I spoke to my building's reception who told me that countless residents are experiencing similar problems and even the management of the building themselves have ongoing disputes. Also be prepared to deal with very very slow callcentres who love to put you on hold.