I wanted a portable machine with the features I used the most that wasn't expensive because it would be toted a lot. I found the Brother 420 PC, not the PRW 420. It has needle up, auto threader, knee lift, thread cutter, start/stop button, speed control, pressure dial, feed dogs lower, needle positioner, and is lightweight. I paid $250 for it new in box. The (PRW model is great, has all the features plus about a hundred more stitch styles) Honestly I have knee lift on three of my machines and never use it. I guess I need to to see what I'm missing.