Bests & Worsts Reviews from Amazon

The printed instructions leave a lot to be desired. The sheet that came with my unit seems to be missing the first couple steps (at least in the English version.) Step #1 says "After the 3, 2, 1 display countdown..." What? How do I get the countdown started? Looking at the manufacturer's web site I found an old version that explained it better. Here is what you need to know: The top button on the unit is the on/off button. This is labeled "1" in the picture but never described. The middle button ("2") is to review old readings. The bottom button ("3") begins the test sequence; this button is not described either (at least in the instructions that came with my unit.) By the way, mine displays "2.2" when I turn it on, so these findings may pertain only to that version. Steps: *Press the Start (#1, or top) button. The unit will turn on, display "2.2", and then display "On." *Have a test strip and your water sample ready. *Press the Test (#3, or bottom) button. The display will count down "3, 2, 1, Dip." *Quickly give the strip a brief dip into the water sample. No swirling. *Quickly give the strip a quick flip to remove excess water. *Holding the unit horizontally, quickly lay the strip into the test slot, without sliding it. It must be all the way up to the top of the slot. *Cover the slot with the black sun-shield provided. *At this point you wait for the test to proceed. You have to have reached this point fairly quickly because the test will start whether you are ready or not. *When the test is completed, the unit will show the three readings on the display. You can compare to your last few readings by pressing the middle button. Be sure to wipe the slot clean with a Q-tip or the cotton swab provided. I've been using this unit daily for several weeks now. I have done all my testing indoors and the results are reasonably repeatable and compare favorably to my color-match test kit. I'd give it 5 stars if the instructions were better and the repeatability was better. But as I said, I think it's good enough to do the job and I'm glad I bought it.