I've always used the convection "fan" option on any ovens I've had, so I can't really compare it to the traditional kind. That said, the science behind them is pretty sound in terms of how it regulates the temperature by circulating hot air in the oven and thus bakes/cooks things more evenly.
Just as pat in east texas said, there's definitely a difference in terms of baking time and temperature: it will bake faster than some recipes suggest (which assume you are using a traditional oven) - based on my experience at least - and you can also keep your stuff in at reduced heat.
For me, I found oven temperature conversion charts, such as the one on the link below, pretty useful when following recipes based on traditional ovens:
Conversion guides - How to cook - BBC Good Food
I'm not sure if American ovens are in °F, if so trusty google can always convert further!
So I guess if you keep in mind the faster/hotter aspect of it, that could actually be a plus? Good luck with your oven :clover: