There are at least 3 main types of superfeet, so be sure to pick the one that works best for you.
The green superfeet have the most pronounced arch support, and I’ve learned it’s too much for me - had the same type of blister problems.
The blue superfeet have worked excellently for me - they have a less pronounced arch support. However, these (as well as the green) have almost no padding in the toe area, and can leave the ball of your foot sore after a long walk. So, I put them on top of the existing shoe insole. This can work fine for many shoes, but does make it a little more crowded inside.
The orange superfeet are a newer version. These are like the blues for arch support, but have padding in the toe, so you don’t need an “extra insole”. These are now my new favorite!
My experience: When I hiked the PCT, I could barely feel my feet by the end - they were just numb… and otherwise painfully sore. I didn’t use any special insoles. When I hiked the CDT, I used superfeet (blue ones) the whole way, and my feet felt just fine the entire way - no foot pain at all. I was amazed. I now wear superfeet all the time, as I’ve noticed they make my knees feel better too.
Anyway, anyone’s experience will differ. Listen to your own body first, not “everyone”. I think that rigid/orthodic insoles are a good idea on a long hike, and can prevent many foot/leg ailments. However, you have to find a pair that fits well. If they feel “funny”, that’s normal, but they shouldn’t give you blisters. There are also some other brands out there that people like… I think Merril has introduced a version that you heat up & it conforms to your foot. I have a friend who swears by these. Good luck!
Jonathan