Small regional and local manufacturers have not had the staying power of national manufacturers. Good track record. The longer a dealer has carried a particular brand of spa, the higher your confidence level can be. Dealers with a history of switching brands are unlikely to have a strong customer referral base or be as willing to service spas they don't currently carry. Just as it is important to seek out a manufacturer with a strong company history, you should select a dealer who has shown commitment to the manufacturer's product line.
Service is key.
Another key shopping tip is to seek out a low-pressure, reputable dealer who can answer all of your buying questions. Ask if the dealer provides a free site inspection to help you determine the best place for the spa. A spa professional can also recommend the size of spa appropriate for your space and family needs. You'll want to do business with a dealer who will continue providing you with excellent service long after the sale is complete. See the warranty in writing.