i have the se3350 which is the se400 without the usb port. otherwist they are the same machine. i've had it for almost a year and have been very pleased... it's much quieter than my ols brother pe150 bot i find the menu options confusing....
i really liked it when they used real light bulbs rather than the led lighting. how long have you had yours?
the threading is really easy and i've gotten used to the thread cutting option...... rustyb