This was my 1st real attempt at a pork shoulder/pork butt/Boston butt (same things).
Notes: I did not cover with foil at any point so I may have lost some flavor from that. Next attempt should cover after 5 hours so it doesn't get too dried out. The inner meat was moist and delicious. The outer bark layer did get a little dry and tough in some areas. Check out this video for the next attempt. It's interesting how he used 275 for a shorter cook time, whereas I used 215.
Here's another video about injection vs no injection. Turns out he liked the no injection better and he never covered the meat with foil until he pulled it out.