Their verdict was hugely positive after a first training centre under the wave-shaped roof of this imposing venue.
For 23-year-old Egyptian Yasser Hefny, the experience was overwhelming. "I would say that I am very happy because I'm here. It's amazing. When I entered the pool I felt a bit afraid - it's huge and there were a lot of people. After I went in the water and swam a bit, it's very very nice - I think this is a chance to break my record."
The Aquatics Centre is the second only to the Olympic Stadium in size, with a Games-time capacity of 17,500 thanks to two temporary wings.
"The swimming pool is like a dream," said Chile's Estan Bustos, who is competing in his first Olympic Games. "I can't believe I've swum in it."
Mexican Oscar Soto has experience of an Olympics after coming 8th in Beijing. But prior experience did nothing to dampen his enthusiasm. "I think this is even better than Beijing as we didn't get to participate in the Olympic pool in Beijing," he said. "We were in the water polo venue. This is perfect. I feel emotional to compete here."
Soto is determined to better his result of four years ago and told UIPM he was in good shape: "I have been training well and I feel ready for the competition. Now I just need to stay calm and wait."
While they wait to fulfil their athletic dreams, the Athlete's Village is providing some welcome distractions. Bustos is hoping to meet Kobi Bryant - and in that aim at least he's already behind Hefny. "The village is heaven for any athlete," said the Egyptian. "I've met a lot of stars, people I'd only seen on TV before like Kobi Bryant and Brian Lochte. I put these pictures on facebook and all my friends went crazy."
But even meeting the great Kobi Bryant was nothing compared to the Opening Ceremony for Hefny. "it was great," he said. "One of the best moments in my life. I hope the competition will be the same."
We all do.