I used a 111w154 to make clothes and handbags at my shop in the 1970's. That machine never failed and taught me machine mechanics (it is simple). The 155 is a better machine, more precise and quieter. In those days Consew was considered a knockoff. I would buy the Singer unless the Consew has reverse stitching. You can live without reverse but why? Also, if the guy has them look at an older Juki they're very good.