Sturdy! We sat on the corners when only soaking our legs. Set up was easy with the help of my mom. Make sure the area you will place it is level. We placed it on the grass, it was easy to move around when empty. once its filled a couple of inches you can see if its level or not. We loved it and whoever saw it always asked where we got it. I saw a few videos on youtube regarding maintaining it, bought pucks, brushed it daily but once I got a dollarstore tarp for it the maintenance was cut down a lot! It was covered nightly and when not in use. We only needed to change the water once - it was not covered, rained all week and the water went green. I also got a special sponge to pick up oils etc. Get a basic pump to keep it clean and inviting. Well worth the investment. Can't wait until next summer! I have yet to pack it up this year so will update if any issues.