Decided to do my own lawn work so I bought this , an electric mower and other stuff, it wasn't too hard to set up,the first time I used it, it was great, the next time I used it, it started off well then I smelt burning,smoke came out of the casing and I decided I'd better quit before it exploded or something. I called amazon and they promised a refund. I heard B&D were good, so I am hoping this is just a one-off. I wish the instructions were clearer too, like what do you do with the lengthening spool, trim it off ? leave it?