Personally, if I'm in no rush, I'll sit there a couple minutes to air dry. If I do need to dry off, you still end up using less toilet paper, just a couple squares to pat dry.
The biggest downside is when you have to poop outside of your house, my butt is no longer used to toilet paper and it just never feels quite as clean as it should once you get used to a bidet.
When I'm away from home and need to take a dump I take care to wipe extra carefully but I still often get some itching and irritation. Goes to show just how effective wiping is.
I love mine so much that i bought one for a friend who recently had back surgery. IMO, the one with the vertical knob (turns fwd/bwd) is better/stays cleaner than the one with the arm and horizonal knob (turns r/l).
My problem with this is our water pressure here is pretty low and the bidet can't shoot out water that could confidently remove some possible sticky stuff. Any suggestions?