My oven has a convection feature. I haven’t had the guts to play around with baked goods, because those can be fussy, and it would be sad to throw away a whole cake or something. But I use it all the time for roasting meat, and it’s great.
I am old-fashioned, and I heat the oven to “high”, put the roast in for a bit, then turn the temp down. So, for instance, right now I am roasting a chicken. I put it in at 425F with convection, on one side. After 15 minutes, I will flip it to the other side, so both sides get nicely browned. Then I will flip it to its back, and turn the heat down. Tonight I have plenty of time, so I’ll probably turn it down to 300F, or maybe even 250F, leave the fan on, and cook it until it’s done. Then I’ll let it rest while I cook some quinoa and chard.
For a larger roast I might leave it on high for longer, and I probably wouldn’t bother to flip it, not because that wouldn’t benefit the exterior, surface, but because it’s a nuisance to turn a large roast over in the oven. It’s easy to shove a fork into the cavity of the chicken and flip it around.
It’s slightly better to start at an even higher temp, but then I get more smoke in the kitchen. This is a compromise.
My roasts have cooked much faster and more evenly since getting the convection oven. They also don’t dry out as much, probably because the cooking time is shorter.
What you should know is that a lot of foods will cook faster with the convection fan on, and you should keep an eye on your cook to check for doneness until you get the hang of using your new oven.
I wouldn’t have bought a convection oven if the oven with the other features I liked hadn’t happened to be convection. But I love it. I’m a convert.
(And I’m thinking I should look for baking recipes written for convection cooking, and just re-learn some of the basics that way.)