i bought a evolution spa from costco 4. years ago. i had one small leak and a service man fixed it no charge. he even gave me some spare fittings in case another one leaked but none did. this is my 2nd spa and i@love it. my 1st 10000 spa leaked and i had to drain it and pull it out of my gazebo and turn it on its side. $1000 later i had my hot tub back. ill go with the Evolution every time. im in NJ so we have some pretty cold winters and i leave it run all year with zero issues