Hello,
I own a filtration system from the company you mentioned above and it has worked very well (noticeably improved the taste of my tap water). I also did some research before making the purchase and found that there were no systems that did not receive negative reviews of some kind. If you're looking for a quality filtration system, I would recommend it. Also, most businesses like these offer returns if you encounter problems and decide to look elsewhere.
Only impersonal life and the Being can give us the legitimate happiness of the Great Life free in its motion. -Samael Aun Weor