Bests & Worsts Reviews from Amazon

My old machine broke down so I spent weeks researching a replacement. I finally decided to give the Stylist a shot because of the good reviews. The first machine I received worked for three weeks (or 3 minor projects). I sewed a few simple curtains and was pretty happy with how the machine handled. I then tried to shorten a few pairs of capris into regular shorts. They weren't denim or other heavy fabric. I got through the first pair of shorts without a problem but on the second pair the tension stopped working. I called the Singer customer service number and was told there was a wait. They offer the option of emailing them . . . lol . . . I sent them an email two weeks ago and still have not received any sort of response. Two days after no email response I called them, put my phone on speaker and waited half an hour to talk to someone. You have to wait on a silent phone with a recorded messaged playing every 6 or so minutes telling you someone will be with you. So half an hour later I explained to the lady that my tension dial wasn't doing anything. The top thread was just sitting on the top of my fabric no matter which way I turned my dial. She told me it sounded like a bobbin issue and that I could take it to their repair shop. No thank you. I hadn't even had it a month. I sent it back to Amazon and decided to give the Stylist a second chance. It does have many good reviews. Maybe I just got a lemon. The replacement machine was on my doorstep less than 24 hours. I set it up, grabbed the shorts and things just went down hill from there. The bobbin thread created a nest of thread twice. When it was sewing 'correctly' it would miss one stitch. Less than 20 minutes after I started sewing, the tension dial stopped working. I packed it up and returned it. The second machine wasn't even in my house 4 hours.