Agree with the normal cook temps, however when I do 4 large butts in the 18.5 or 10-12 large butts in the 22.5 it took a long time to come up to temp until I added the extra vent(s). That and doing 300-375 degree cooks made it worth it for me. Sometimes it also comes in handy if needing to bump a 250 cook to 300 for timing as I do a lot of big cooks for others.