Hi -
We have a Freeflow RLX and we're quite happy with it. We added the ozonator and the LED bulb.
The Passport looks very interesting.
The Freeflow company has been in the rotational molding business for many years, and spas are one of their more recent products.
They have a two-speed pump and a separate heater, which is a step above some other similar tubs. They can be used at 120V or 240V.
There are many that will say Freeflow and similar lower priced spas are NG, but for those of us who simply cannot spend $6000 to $12000 on a spa, it's a good product. No, it's not a Hot Spring, Sundance, or Marquis, but IMO it is decent. It is not the ultimate in therapy or luxury, but it's just fine for $2000 to $3000 complete.
Their Customer Support is excellent. I've had several technical questions that my dealer couldn't answer, and the Freeflow staff is terrific.
I know some will say if you can't get a "better" spa, don't bother, but we're glad we have our Freeflow.
Try to wet test, as that is really the best way to help you make your final decision.