The pros don't use them because the screws are going to be significantly more expensive preloaded. Also, they go pretty darn fast with a traditional screw gun. If you are OK with the high cost of the screws then I would say have fun with your new toy.
I just checked 1000 screws cost $18 collated for that gun or $.018 each
25lb box goes for $38, 25lb box is ~5000 screws or $.0076 each
Essentially more than double the cost.
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