I've never used a serger before and I've only been sewing for a few years, but my mom gave me money to get a serger as a pre-baby gift. I've been coveting a serger, any serger, for several months now so I was so excited to try it out. I have to say, I did lots of research and the reviews made me very hesitant to buy this serger, but I'm all about buying from brick and mortar stores for major purchases such as this one. It was on sale and I figured it wouldn't be too tough to return if I decided I didn't like it. So, this is the one I got since it was the only one I could afford that was available in my teeny, tiny town.
Thankfully, I was VERY pleasantly surprised. It's heavy enough that it feels very sturdy, but light enough to be very portable. (that's great for me since I don't have a permanent sewing station in my home) When I got it home, I decided to try to rethread it right away, since that seems to be a major complaint about most sergers, and it took me about 10 minutes following the instructions on the machine and in the manual. Since then, I've had no trouble rethreading following just the machines color coded instructions when changing from 3 to 4 threads and back. And that doesn't seem to take any longer than my regular sewing machine.
Some reviewers have complained about the noise of this machine, but I'm not sure what you are expecting. It's much quieter than my cheap White sewing machine and my one-year-old has no trouble sleeping in the next room while I'm working with it.
The stitches are very smooth and once I adjusted to the speed of the machine (it goes much faster than sewing) I've been very pleased with the finished products. Within the first hour or so of trying it out, I had mastered a 3-thread rolled hem and standard 4-thread overlock stitch, the two stitches I most wanted the machine for.
Anyway, don't let the negative reviews scare you out of getting this machine. It's very simple to learn how to use and makes beautiful stitches. I honestly can't find anything to complain about.