Solar operated hot tubs / spas are in the long run cheaper than hot tubs that are heated by a conventional means such as electricity or gas. The sun is a free resource of energy and it is a good idea to take advantage of it if you live in a sunny environment.
Solar hot tubs are the best choice if you are interested in saving money and the environment. You will probably have to spend a little more up front to purchase the solar heaters / pannels but in the long run you will benefit. The sun give us free energy every day and a solar hot tub is the perfect choice to harness this energy.
The solar powered hot tubs are made very well and should last a life time with the proper care. You must be sure to maintain them regularly and treat them as an investment. If you do this though, you will have a lifetime of happy memories with your very cool solar operated hot tub and you will undoubtedly be the envy of the block.