We've had a hot tub for years. First one was older and smaller, second one is larger. My biggest complaint about the larger one is I cannot lift the cover by myself. I have to have my husband or one of my sons help me, or I don't sit in it at all. Make sure you can lift the cover, or get a lift for it.
In the winter, hubby likes it cooler while I prefer warmer temps. Summertime we let it cool down quite a bit which is nice since we don't have AC.