BT reduced my achievable speed as a result of so called technical problems, when it had been stable at over 45mbps downloads since installation up to the point of the problems. Now reduced to below just over 25, with no real reason given only "line stability" - we are less than 300 yards from the cabinet! However BT are now trying to sell me Superfast up to 53mbps at an additional cost! Wouldn't trust them as far as I could throw them. Customer service appalling, and they always start out with any issue being the customers fault, and BT is the arbiter as to whether it is your fault, in which case you get a £150 or £250 bill for your callout. Go with BT at your own risk!