Thanks girls! So, far, in general, I love it! A lot of new things to get used to, though, including not having a lever to raise and lower the presser foot. I keep reaching for it, only to realize there's nothing there...
Haven't tried a lot of the bells and whistles yet, but... the presser foot sensor thing is unbelievable! I tried to sew across a little 5" x 5" "quilt sandwich" which I had made a double fold on in the middle (i.e. three layers of batting and six layers of fabric) and the machine just went from the single layer, over the fold, and over to the single layer as if nothing had happened! The stitches were completely even and the presser foot just adjusted itself instantly as the thickness shifted. It'll be breeze to sew over very bulky and multilayered seam allowances with this machine!
It is generally very quiet, but at low speed in free motion mode (one of them!) it makes an extra sound which I'm not sure should actually be there... Might have to go in to my dealer to listen to his demo machine tomorrow to see if it sounds the same!