Ha! I think my serger is about 25 years old? It is an interesting story. I had a Viking 500 which I loved but figured it was time to get a fancier machine, so I went to look, they had a deal on the Viking D1, was a bit nervous as it was pretty expensive but got it. When I got home, the dealer called to tell me I had forgotten my serger! What serger, well I did not know, but the promotion included a serger! Anyway, I have had my Viking 905 serger ever since I have had no problems with it since except I did have to replace the knife. It works just fine, I have gone through 4-5 layers of fleece with it, It is just a basic four thread serger and I do have to thread it correctly but I have no reason to upgrade.