Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Why 10 stages?  More expensive units only have 3-6 stages.
Document: Buyer beware. Very confusing instructions and didn't even label one of the parts. Didn't work as described. I'm sending it back. Don't buy this one!Portable Reverse Osmosis System 10 Stages of Filtration
i first ordered the 10 stage filtering one which had good reviews but after i tired that it didnt improve the taste. this does the job but as with any RO it wastes lot of water.
I will soon invest in a water-purity indicator and update this review again.I have been using this system for more than two months now and feel this is an absolute great value for money and saves me a lot of trips to the local grocery store to get safe but expensive 'reverse osmosis' water. Again, I highly recommend this system to anyone looking for a portable reverse osmosis drinking water solution.
This system was easy to setup. It included easy to follow instructions and I managed to get it working in only a few minutes. Pure, great tasting water was ready in a jiffy!
The piece I got released some black particles from output but after 15 minutes it worked fine and it has been almost year and it still works great. Great tasting water.
It takes about 2 hours to fill up a 5 gallon watter jug but having fresh great-tasting water is well worth it. Before adding this RO system to my kitchen sink, the TDS (total disolved solids) was around 500-600. Now, with the RO filter in place, the TDS has dropped to a mere 30!
I was hesitant to buy, especially after reading some of the other reviews criticizing the setup which sounded complicated. But I have to say rest assured, setup is very easy and intuitive. Not to mention great tasting reverse osmosis water right in your home.I did not test the water quality after installation myself, but I believe the numerous reviews around the web praising this system for removing impurities, especially heavy metals and other toxic chemicals.
I have this product for about 1 month now. So far its performing good. Installation was fairly quick and easy.Water rejection is higher, but was acceptable to me. Other key thing I didn't like was very slow rate of water, so I have to put tank to store water instead of using it directly. And this need monitoring when tank is fill.Taste of water is good.
Great affordable RO system, no more going to the store to buy water. Fast and easy installation. Exactly as advertised.
Answer: yes