Not happy at all, engineer came only checked the aerial lead going into the booster, said the aerial was 30 years old so you may have to put up a new aerial. I sent an email asking about the cost and when could you do the work, never got a reply. I got another company in who did the same check on the aerial lead but he also checked the lead from the booster to the BT Box, as a result the Booster was faulty nothing to do with the aerial, he relaced the booster everything is now perfect. So for just 10 minutes in my house and just testing ONE lead I was charged 59 pounds, what a rip off AERIAL FORCE plus perhaps you need to send that engineer back to school.