I think to be honest I really wanted to be able to check Paraguay off my travel list ...and we were so close!
There are lots of people walking across the bridge from Foz do Iguacu but mostly locals . It would probably be fine if you were in a group. There are border stops at each side and border police but I didn't see anyone being checked.
We arranged before we left Argentina to have a van take us over , wait and take us back . We were the only English speaking ones , the others were from Argentina. I was concerned when we didn't stop at the brazil side to have our exit stamps ...but we had no problems . We just drove right through both sides.
We booked this through
http://www.ripioturismo.com.ar/eigr.htm . Cost $53.00 each
They arranged our pickup at the airport and the touring on both sides of the falls.
On our visit we had a great time just roaming around and taking in the sights of this busy border town . We stopped for a coke at a little "whole in the Wall" cafe and had a great chat in even with our limited Spanish with the owner. He was so friendly and welcoming. He and his wife own the little spot and rely on the flood of day-trippers for their livelihood. His name was Carlos!!
We were looking for a Paraguay T-shirt and he hustled up the guys in the next shop to track one down for us. Unfortunately it was a bright red and white striped . Oh well!
I know we didn't see much but it was neat to see the border town we had heard so much about!!
The border town of Ciudad del Este is shear madness. I have to admit I love to shop in markets but the stuff here is such junk , straight from China I'd say and not the good knockoff stuff.
We enjoyed the chaos though and it was pretty much what we expected.