I wanted a salt water generator that we could manage separately without having to run the pool filter all the time, after quite a bit of research we went with the saltron Retro salt water generator. We have a 24 x 54 round Sharkline Matrix above ground pool. Upon opening the package we found that it hangs over the wall rail UNDER the top rail. As those of you who have matrix pools know, none of these fit our pool. I rigged it up using bungees to hang over the top rim without any problem (it's light). Added 12 bags of salt and a gallon of liquid CYA and ran filter for 24 hours. Turned on the retro and it immediately started generating chlorine. I set it for 6 hours/day since the pool's still only 55 degrees. It's really easy to use, no sound whatsoever and I stuck a strip where the chlorine comes out and it is generating. So far we're very happy! I love the fact that I can run it without requiring the main filter (we have a second intex filter on the solar heaters so that creates enough of a current for distribution and alot cheaper to run) and I can move it anywhere in the pool that we want. It's a great little unit that has the built-in timer and also lights that show the salt level. So, for those who don't want to spend several hundred dollars for a SWG I would recommend this as a less expensive option. If we get a couple of years out of it, we're still ahead of the game.
here's a photo of it in our pool. You can see the small bungee on the inside rim holding the front down, on the outside we have 2 bungees going to a weight on the ground to keep it from flipping in. It's really light so no big deal.