I've had my Juki F300 for a couple of weeks now, and I absolutely love it. The box feed, auto threader, auto thread cutter are just what I wanted most in a machine.. It's great not having to cut all those threads off, and I think that saves a lot of time... not to mention thread..
The knee lift was available, but I didn't like it..didn't want it. Probably would get used to it, but decided it wasn't something that I needed.
By the way, my Brother feet fit my Juki...... pleasant surprise...
Love those Jukis!!