Hello Thomas,
I have no experience as a user with these inflatable whirlpools, but as a professional I have searched the internet for serious opinions; according to this, an important feature would be a quickly functioning water heater, quiet operating noises (the pump noises should not be louder than the bubbling of the massage jets), adjustable temperature, running costs for operation: electricity, simple and effective cleaning.
Manufacturer information: "The filter pump / water heater is almost noiseless (about as quiet as a refrigerator). When the massage function is switched on, the pump is clearly audible outside the pool."
Consumer: "In my opinion the filter was simply annoyingly loud, so I built a box made of wood and insulation material around it for noise reduction, which naturally also had the advantage that the blower was not heard throughout the whole village while running... cowardly...
all in all a nice experience that was not cheap. For me it is definitely a decision aid that we will put a solid whirlpool in place in the foreseeable future..."
Consumer: "Processing appropriate for the price. High fun factor, also usable as a children's pool (under supervision!) for our 3-year-old.
Negatives: sensitive inner liner (cats!), loud motor, power cable too short."
Consumer: "Do not under any circumstances think that the pool proves to be cheap in daily use. It is worthwhile to switch the heater on only at night.
(In Switzerland off-peak tariff 22:00-07:00 approx. 0.12 Rp per kWh, peak tariff approx. 0.23 Rp per kWh)
The temperature is only maintained during the day, i.e. thanks to the good insulation the heat loss is relatively low and the heater runs only rarely. For example, if the pool is heated up on Friday evening and used over the weekend, the costs amount to around CHF 10.- (electricity costs only), plus the costs for chemicals and cleaning, which are however low."
Consumer: "As described above, I have been operating the thing for some time now. First in winter in the basement, now outside. We have already had many nice whirlpool hours.
Water care is simply easy. I use chlorine granulate and pH reducer.
To check I use a measuring station with DPD1 and Phenol Red tablets.
These are very accurate. (The CL1 tester described above unfortunately proved to be too inaccurate.)
About every 2 days measure, dissolve some chlorine granulate in the water and add it.
Definitely watch the pH value; it is very unstable at the beginning when refilling new water. I always have to lower it. Over time it stabilizes and then only needs to be lowered occasionally."
According to the information on the homepage, water care costs about CHF 180 per year, which should also be taken into account. The water is chlorinated. Spare parts are available - again according to the homepage - "only while stocks last". Furthermore, you must change the chlorinated water every 6 weeks at the latest, otherwise the plastic suffers, may become brittle - the pool would leak.
Hope this helps for now. Maybe some "real" experience reports will come later.