Generac Transfer Switch Is There Any Advantage Or Disadvantage To Using A Automatic Transfer Switch With A Portable Generator?

Is there any advantage or disadvantage to using a automatic transfer switch with a portable generator? - generac transfer switch

I can get a distance of 14 or 16 100 Amp automatic transfer switch from the local authorities GENERAC made for $ 200 or 10 circuit breakers 30 A Manual for about the same price. Mi is a Generac 8000 watt portable generator, it is possible anywhere, and simply run A / C when I used the circuit breaker 100 amp? Is there an advantage or a disadvantage for the implementation of an automatic transmission or manual?