Unfortunately we had a very bad experience with Christin from Optimum Pool & Spa. We hired him last June to maintain our pool. One of the first things he did was to clean the cartridge and in doing that he put it on our wood panel and broke the panel. Then we asked him to replace our pump. He really struggled with the pump. First he could not get a Pentair which he had quoted us and got a  STA-RITE, without clarifying this. He only mentioned that he could not get the white color and we need to get the black one. STA-RITE is not the same as Pentair, but he charged us for Pentair. Then he had a really hard time to do the job itself. First he got the wrong 3 way valve, then he could not get the electric panel, then the wrong circuit breaker, so for almost three weeks we had him coming and going to do the job. Even during the installation of the pump I could see him video chatting with another person to ask questions. The other major issue was his assistant who could not speak even a single word in English. Once that I wanted to make sure he would lock the safety guard so my toddler could not get in. I had to bring someone else to tell this in Spanish to the person cleaning my pool. Then finally he recently took our sweeper for maintenance without telling or checking with us. The pool was clean and the water was clear and the sweeper was doing fine. He took it and then sent us some pictures that the sweeper needs this and that and would cost 280$. I told him to bring it back and since then it is not working. I got a new Polaris 280 sweeper and now he is asking for 45$ to install it.