For the money, I believe that this is a good value! The heater worked very well, taking the temp from 40 degrees to 100 degrees in 14 hours.  There are a couple of issues of concern; 1) initial filling of the spa, the pump would not move water.  We contacted QCA and they immediately made an appointment for a local spa repair to find the problem. In the mean time, watched a youtube video which said to ensure that you fill the tub with a hose through the filter so when you start it up, the pump won't be air-locked.  The repair man came, I had filled the tub through the filter.  Start up still required bumping the motor several times but it did clear the air in the system. 2) the trim around the access panel is put on with small staples and trying to remove the panel resulted in two of the trim pieces falling off!  

Pros: quick heat up time, power of the jets (for a plug and play), the ease of setting temp and jet / air pressure
Cons: Better instructions and redesigned access panels.