For me, it’s always been dependent on chemistry. Some providers I click with quickly and an hour+ never seems long enough. E.g. Chanel Fox, Savannah in Colwood, Crimson Day, Cali Rose, Sage are all wonderful people I’ve gone back to repeatedly for longer sessions, and if you click they will treat you well.
I’ve also made the mistake of booking an hour with lower cost providers and left within 20min kicking myself for being too hasty/impatient to book with a more reputable person.
Might also be my style - I genuinely approach sessions as a GFE experience that’s two ways as much as possible. Sure, there is a transaction taking place, but I still see a duty to help her have a good time as much as is possible. But all of this is YMMV. Follow reviews, be willing to spend time to build the relationship (in a healthy way), good things will come