Like many i've long preferred the kind that have large natural habitat like enclosures. The ones at Honolulu Zoo when i lived there were better than many back in the 70s.
The Marmoset one was so natural they could disappear in the tree branches thoroughly. I was quite taken with them and would visit a couple of times a week after work. Got where they seemed to know me, i could imitate their sounds. Several times tourists would be saying "It must be empty."' and moving on. If they had young kids with them i'd make marmoset noises and out they'd come, much to
the children's delight.
My last visit to one was around 2010, the Denver Zoo with son, DIL and then toddler grandson when we had interesting interaction with a silverback gorilla. Who seemed drawn to Liam but bugged by noisy middle schoolers doing bad primate imitations.
My all time favorite zoo exhibit is one i saw in Honolulu, but has shown up around the world: " The most dangerous animal in the world ". Here's a short clip about one of it's earliest appearances. The one in Honolulu had super thick bars, dark interior and one had get fairly close to see it. Next to visiting the marmosets one of my favorite things to do was sit on nearby bench where i could observe people's reactions.