Climate, region, performance, product composition, fuel consumption, fuel availability and most important consumer behavior and habits make equipment a variable that changes from job to job.  Staying competitive is important and putting together packages saves time, especially if they are satisfactory in performance and function, but a certain percent of this fails to satisfy the customer.  Two sources of complaints when it comes to spas and equipment are usually related to heating time/costs and unsatisfactory jet action.  This can lead to some homeowner disappointment and because of poor planning, additional expenses in upgrades to equipment.  Time should be spent asking or finding out about homeowners expectations and desires for using the pool and in particular, a spa.  Heating time and Jet Action especially in the case of a spa is the most important single factor for enjoying it.