Have you checked to see if the motor power is the same on the 215 and the 350? I don't know the answer, but I was under the impression there was a difference. I don't have a 350, but I have the 380. Stepped up for a couple of features I wanted. I love the machine. I do a lot of applique and it does a beautiful job. The knee lift works really well for me. My machine is in a cabinet made specifically to fit the machine. I haven't had any problems with the bobbin access. I don't have to take my project off the machine when putting in a new bobbin. The reason I bought the 380 rather than a larger machine is because I wanted a machine I could lift easily, take it for service/cleaning myself, etc. I think the harp is too small to quilt anything larger than a table topper or bed runner.