I just purchased a used 07 optima. I bought it for a farely good deal knowing it had a leak on the water fall system, cause of a missed procedure to clear that part of the line before winter. It was extremly easy to fix (minus a little bit of mess from all the foam parts). The dealer talked to me for about an hour just on what to keep an eye out for when I was looking at buying a used tub. I found that to be very helpful and amazing, that they would spend that much time with me and really not get a thing out of it, except my returning service I guess for being helpfull.
Now for my only gripe would be that I found the two seats that arent the "main two spots" and looks like there for the pumps to always have a path of flow. Are that they suck and really are a let down with the lack of thurst/power of the jets. I know there whole speal about small HP pumps is if the water dynamics are balanced theres no need for large HP pumps. I find that the two main seats have more then enough power and I even throttle them back, but the other two just never really have enought( how is that balanced ). I know that I would be choked if I had boughten this tub brand new for the 12000+ price tag.
Maybe cause my is a used unit or something might cause it to be lack full. But my girlfiend and I have really enjoyed the tub, and find it perfect. minus the two lackfull other seats, making me a little worried about asking people over. to only make them think all sundances are like this.
I wet tested about three other spas before I wet tested a Maxxus ( thats what sold me on buying the used sundance ) and I found all the seats to be full filling. I thought the optima would be almost the same as the maxxus minus the one pump and lounger and size.