We've used GUARDIAN POOL SERVICES at our home in Newmarket for the last 4 years for pool opening and closings of our in-ground pool. Giancarlo is the personable and attentive principal in this growing business. He understands the unique needs of each setup and has done a superlative job with openings, closings, a liner replacement and a filter head replacement. Everything is done with diligence and costs are quite reasonable. Their company, in all their services, has exceeded our highest expectations and I confidently recommend their services to those looking for good value and exceptional service.