The hot tub was delivered on time and the delivery folks were very helpful in placing the tub next to the exact location in prep for the-setup. But as it turned out the tub was on its side just like the manufacturers suggestion, it had flattened the side it was sitting on and caused the bottom to flex as much as 1”(inch) so it would not sit flat on the patio floor, (FYI the floor was leveled by professional masons, ) after examining the bottom and trying to contact the manufacturer, the information given in the booklet said that the shell could flex up to 2” ( inches) . I have set it up and had it running for 6 days and so far everything seems to be in good working condition