I have owned the Pro22 for about a year. My experience has been awesome once I got a few thing figured out.
First the temps would swing like mad, after experimenting my final fix was to adjust the stack cap, I think I lowered it about 4 1/2 turns from factory setting. It now maintains temp great and even seems to produce more smoke. I will say it will still reach max temp of about 450 but might take a little longer to get there.
I have noticed if I smoke in a shaded area maintains temps very well. Anytime I smoke in direct sunlight the temps seem to run higher than the setting.
I did have 1 grease fire, I smoked a pork shoulder and some pork ribs, a couple people wanted burgers, I made the mistake of turning directly to 400 degrees and ended up with a fire. Now I work the temp up slowly allowing the grease to slowly burn off without catching fire.
Should be a great entry level smoker. I have smoked a lot of great meat on mine.