I agree with the above posters. I'd get something more like the Aquaticlife Junior model or something similar. Don't go cheap. I bought an Aquaticlife system five years ago and it works great.
To repeat a bit what others said, I hooked up my R/O system to a 40 gallon storage tank with a valve so R/O water is always being produced and stored. But straight R/O water is too acidic and sterile to use as is, so I hooked up a tap water line to it with another valve. I adjust the tap water flow so that the mixed water comes out to what I need, pH-wise, usually around 6.5.
My R/O unit is rated to produce 60 gallons per day but it produces more like 30 or so. Which works fine for me.
Remember, you will waste about 3-4 gallons of water for every gallon of R/O water you produce.