Both benefits and drawbacks. The area you'll primarily use it needs to be a big factor (legal? Stumps? Deep water? Etc.)
Fun and effective, but dangerous and requires frequent repairs (especially when inexperienced drivers get on the stick, or it's not properly maintained)
I've been around, operated several for work and they are my favorite boats...but I've seen enough invoices on repairs to know I'll never want to own one.
Main thing is to have a network of people that can get you when you either get stuck or break down where only airboats can get...it will happen.
Airboat specific forums may help.
Feel free to send any specific questions