Had them come out 2 times because all my sensors were falling off the windows from the blinds hitting them. First guy sticky taped them on. 2nd guy, Ireti screwed them all in to fix it and glued one in a bedroom to be safe not to break the window from drilling. Then after he left i find out he cracked the glass in the last bedroom window and did not tell me. I was told by Hello Tech to pay him for the screws when he showed me the receipt which he conveniently said he lost when i asked for it. He said they were $17 and some change so i trusted him and gave him the cash. After he left I found out he never bought the screws and he lied about losing the receipt. This is such bad customer service. He knew to show the receipt and took advantage of me. Now I am waiting for the "Incident report" to get to management to see if they fix my cracked window and who knows if i get my $18 back. All this drama is not worth the $79 install fee.