It crushes the frame rate when there's a lot of logistics stuff going on. I notice it mostly when I'm trying to help out the robots picking things up out of chests and moving them to storage, or seeding storage chests, it really makes the game chug.
I think it's OK to have the option. Personally, I don't always need to see the info; only when placing chests and roboports really. During other times, when selecting chests especially, I don't use the info.
Mouse over a chest:

Mouse over a roboport:

When the overlay's not showing it runs great at 60 FPS.