Does anyone use a pressurized sand pool filter?

I have been thinking about buying a pressure filter, and they ain't cheap! I was in a pool store recently looking for a fitting, and they had some filter systems on the floor for less than what I see them for that are being sold as aquarium and pond use. They all use sand and I really don't see any difference in design. I was shopping for something online this morning and saw one sold by Intex that included the pump for just $290. It is rated at 2650 GPH. I figure that even if the pump only lasts a couple years it's a good deal.
Here is a link to it. Take a look, and see what you think.
Thanks
Rodger
http://www.vminnovations.com/Produc...nd-Sand-Filter-Pump-Set-28681EG-56681EG-.html

There are others I found after posting without salt stuff.

http://www.amazon.com/Ground-4500gp...8&qid=1395255214&sr=8-27&keywords=pool+filter Here is a link to Amazon. This one is a little different. Not DE, but pool filter sand. The more research I do the all in one units like this have power hog pumps. This one burns over 8 amps! I have found some Hayward pool sand filters for about $200 that I could buy a pond pump for that burns a lot less electricity. One thing I need to research off of the pond filter sites is the pumps. Since you are pushing water through this lump of sand they must be high head pumps. Anyway, I have found enough information since the original post to make me think it is feasable. I will be filtering two tanks. a 700 & 240. I have an FB filter in a stock tank with 100 liters of K1. My water stays cloudy using 100 micron filter socks, so I figured this would do a nice polish.