I am getting close to choosing a builder for a new igp on Long Island. The experience has been interesting to date and I had settled with a fiberglass design when I came across a builder that uses the subject walls with a liner. I like that I have more flexibility with regard to the design because my space in the backyard is tight and I don't have the $$ for gunite. Does anyone have any experience using these panels or an opinion on them versus steel walls and/or a fiberglass igp?