We purchased this spa tub a year ago. Initially there was an issue with a defective sensor, but customer service provided technical assistance and replacement parts to get it up and working properly. My husband and I enjoy this hot tub year round, but more so in the fall and winter months. Replacement filters must be ordered online, as we thought we could purchase at a local spa store, so the more filters you order the less the shipping, thus the reason for 4 star rating as we learned the first time ordering only 1 filter the shipping was more than half the cost of the filter.