Owned previous hot tubs made from acrylic, metal and wood.  Metal and wood do not like water.  This is one piece rubberized plastic with Barcelona spa internals.  Packaged very well and heavy duty.  We used the 220 v 40 amp connection. Love the led fountain.  Lots of jets for a small tub.  Easy to move around empty.  Easy for 3 guys to carry into backyard.  With everything running draws around 16-18 amps, so very efficient.  The best hot tub I have ever owned.  Fantastic price.  This tub has great reviews out of its factory in Florida.  It was worth the wait.  Would highly recommend.