I took two machines in around here and both had a bur they sanded off and just a list of maintence Things they did, they did a test sewing line. When I got them home they had not cleaned the bobbin area out. I left them dirty to see if they would clean them, I'm not sure they did a thing to them. $89.00 each, I heard a noise that wasn't usual, they couldn't find a noise, 1st thing they do is put in a new needle. I have wised up and put an organ needle in them, what the Mfr. says to only use in them. Decided I would not take them in again unless they stop sewing.