We are just starting the process of building a pool, and we want a pool with a deep end and a spa. We were originally looking at a fiberglass combo pool with spa. However, the more I read horror stories of cracks or coating failures, the more I lean toward a vinyl liner pool. We had a vinyl pool in our last house, so we know what to expect with those. The pool builder recommended a fiberglass spa that spills over into the vinyl pool. Anyone have an insight on adding a fiberglass spa? We did like the design, but just wanted to make sure these hold up over time. Thanks in advance!