I have two BGEs, a medium and a large. Looking at the Primo website, the kamado looks just like the egg. I would expect it to behave like an egg. For long slow cooks, I would buy a ceramic cooker. The thin metal ones would hold less heat.
It takes a little patience to manage temperatures at first. Controlling the fire isn't hard, just don't be in a hurry. You'll make great ribs, chops, pulled pork, pizza, turkey and prime rib. They also have a great temperature range, you can even crank the heat up for 700-800 degrees and sear steaks.
For easy low and slow cooking, look at a
BBQ Guru. It adds set it and forget it convenience to charcoal cooker.
Also, look at
Dizzy Pig for some great rubs.