I bought my 6600 several years ago when I retired and got into quilting as my main hobby/activity. I have never taken the foot petal out of the box as I use the stop and start button exclusively and I too love the scissors. My needle threader is getting a work out due to my vision making threading the needle by hand more difficult with age. I love my walking foot and use it and have never had a wrinkle in the back. I love the extra room on the bed of the machine. I am not interested in getting the 7700 as I think it is to much money for a couple more inches.