Opinions on your dog doors?

I’ve been thinking about whether dog doors are actually worth it, especially after opening the door over and over again for my dog. At first, it seems like a simple solution, but once you start looking into it, there are way more options than expected sliding glass inserts, wall-mounted ones, basic flaps, even electronic doors that read collars, plus a bunch of different brands and sizes. It made me wonder how these actually hold up in real life. Do sliding door versions feel drafty? Are wall installations really worth the effort? And for electronic ones, are they reliable or do they glitch sometimes? I’ve also heard that dogs react differently some love the freedom right away, while others are scared of the flap and won’t use it. Then there’s the possibility that once they figure it out, they might start going in and out nonstop. On top of that, there are things people don’t always mention, like bugs getting in, dirt and mud, noise, or even other animals and security concerns. For anyone currently using a dog door, I’d really like to know how it’s been for you, what setup you have, what kind of dog, and if you’d still choose the same option or change something.