I feel like I heavily changed this recipe, but it was delicious. Made it with turkey because we're not big on red meat. Based on other reviews, I doubled the sauce but halved the brown sugar (so I only used 2 tbsp) and it was plenty sweet for us. Will make again and again.
Update: I've made this with both turkey and beef, and the turkey holds the sweetness more than the beef does, so I agree with having more brown sugar if you're using hamburger meat.