Even if a fiberglass swimming pool builder is good and you feel comfortable with their skills and ability, their schedule needs to sync with your schedule. A good pool builder will most likely be booked, so you may want to start the search process early in the season or reset your expectations as to when the pool can be installed.
Never choose a fiberglass swimming pool or a builder based strictly on schedule. Make your choice on the quality of both the product and the builder. A high-quality builder will never sacrifice quality for speed. Remember, if you are a first time pool buyer, another couple of months will not hurt you. Stay focused on quality.