It is very simple to calibrate and use. Not cheap and requires you to pay attention to the directions and routinely calibrate. Best purchase ever.

This product performs all the measurements described by the manufacturer quickly and easily. Uses 8oz of water for 24hrs before use, calibrate the probe with the solution provides as instructed, and wash the probe before and after use. Works great is ...  Read More

The results are not accurate or repeatable - even after calibration. You can get it calibrated and it will work for a test or two (if your lucky), then the delusion sets in.

The chlorine, ph, temp and orp readings are so far off that it is essentially useless for the purposes of maintaining pool chemistry. Only reading that may be correct is the water temperature.

The only value that seems to be within the ballpark is the salt level. The screen is very difficult to read and will become unreadable in about 1 year. It is so dim that you cannot see it unless you are almost in the dark.

The meter has a 1 yearwarranty and i returned it for repair/replacement. Sent an email for replacement under warranty but never heard from seller. Returned for a refund.