I rarely set foot in the PX.
Electronics are out of date. Staff is hard to find and when you do find someone they don’t know what is going on.
I don’t shop at the commissary either.
The zero sales tax is the only advantage the PX has, so big ticket or big shopping is better than regular shopping.
I’ve always like the commissary, and thought they did well with meat and brand name shelf items. Their fruits and veggies spoiled too quickly. Unfortunately, for me, I retired about 2 hours from the closest PX/Commissary, so I mostly do big box retailers.