Which is better, Open Cell or Closed Cell Spray Foam?

"It was excellent.  They were just good on everything, personal skills, cost, and helping us out with the government. They did everything they said they would do."

-Nancy S. North Haven, CT

"They installed Tripolymer on outside walls and spray in the attic. The team arrived, did a great job including cleanup, and was very courteous. I enjoyed meeting them and am now enjoying their work in the form of a much warmer house."

-John T. South Salem, NY