I have one and really like it. It isn't a 'top-of-the-line' sort of spa, but very nice, IMH (and biased, I suppose) O! There are some other people on these boards with experience and I think they will weigh in on this once they see the thread.
One thing I really like is their filter system. It is a cloth bag with a plastic frame. It seems to work well, and every week or so you just slide them off, drop them into the washing machine with a 1/4 cup of bleach and they come out looking like new!