I don't use ours all year round - I'll typically start it in late March or early April (when the weather starts to turn) and then shut it off again come June/July when the pool is hot anyways. I'll then start it up again in September/October when I close the pool and usually shut it down again after Christmas. I used to run it all year round but found that in the dead of winter it didn't get used a lot (I enjoy using it in -20 or -30, I just do not enjoy the part about getting to and from it) and in the summer we never used it at all.
Maybe too many hot baths as a kid growing up in England, i just don't get the appeal of sitting in it.