Whittaker has done both, closing and opening of our pool in the past and I was very satisfied with their service. They're prompt and very efficient. They are closing our pool this year again. Originally I set the date for Sept 13, but with the beautiful weather we're having, I called and asked to postpone it for couple of weeks. They were very accommodating and agreed to come and close the pool next week. I have been purchasing my pool supplies and have the water tested at their store for more than 5 years.