Much better than old ones 20 years ago. Nice to separate top tank & only need to carry bottom. ***Open small vent before opening the main drain valve to avoid a blast of air/'water'. Nice quality. Girls are happy on the boat ! Disappointed mounting brackets are not included, missed the fine print. A bit ridiculous in my opinion... Amazon shipping next day was pretty bad, didn't show until 5pm & said business closed even though its 24x7, driver didn't bother getting out of truck. No tracking other than "out for delivery" so be available for the day and watch the driveway closely!