Hi, we are building a pool in Arizona. At first, we were going for a fiberglass rather than a concrete pool due to terrible water conditions, and advice from builders to pool owners to stay away from gunite and the like. Our pool builder is pushing a vinyl liner pool. Very few people in our area have inground liner pools, and I am a little worried it won't hold up to our harsh conditions (115 plus temperatures, full sun, etc.). I know two people who have vinyl liner pools in our area. One says she would never have another kind -- she absolutely loves it and has only had to replace the liner once in 10 years. The other guy has had to replace his liner 3 times in 15 years, and now he is getting a fiberglass pool. I am so confused! Please help!!