Although I'm new to all this (but not to engineering or making things), the SD2 worked out of the box (*much* better than I had expected; just needed a little common sense to set up -- beyond that, a glass bed helped, too, esp. with large prints .  Already printed and designed a few items (including a spool holder on Thingiverse -- first post, can't include links yet, unfortunately), and added a fan and a RasPi with Octoprint to the machine.  Looking forward to even more fun with it!