Sam’s perspective is spot on. When you subject yourself to the sales process, they emphasize the "talking points" to sell their product. It does not mean it is the best thing since sliced bread. We have seen a lot of good things come and go in this industry, while quality prevails.
Let me ask, "What is the purpose of a salt generator". While I know the answer, you need to understand it is there for the water, the biggest problem in our industry, and they are trying to find the better way of addressing good water quality. If you want a suggestion, "look at the quality of the water" in the display spas. That is the key to what you may expect.
Water quality is the most talked about issue on this or any other site, and that relates back to your introduction into Hot Water, the dealer you buy from.
I am an ozone proponent that realizes the need for chemical when necessary. The purpose of a salt generator is to produce chlorine as a chemical agent, something like ozone isn't it. An appliance that is supposed to be the solution, but still needs to be understood. Salt water is corrosive, end of story. I have witnessed manufactures that have used it, and then removed it; maybe it has something to do with warranty claims. Those who sell it and promote it are selling their product line with the attributes that it represents. You become the best judge in what is best for you.
As for what would be appreciated by the consumer in a product, let's start with the ambiguous word Quality, then water treatments and expectations looking at their water quality in the display model, then performance, energy efficiency, followed by service and support.
The best advice is to set your $ range, measure what you find, and if necessary adjust your $ range to afford something you will have and use for a very long time.
As for shows, they can be a draw for "fish bait", you must know what you are looking at and this is a good sounding board to inquire before you make commitments. And then, there is the critical issue of who you are buying from.