Things to look out for and consider with a cheapo pH meter are the resolution and accuracy. Make sure that the model is accurate to the hundredths place, not the tenths. I also have a third buffer solution to check the accuracy of the meter beyond the two used for calibration.
Lastly, think of these as throw-away items. They rarely last beyond six months, let alone a year, though much better life can be had if you treat the probe end carefully. It is really not much different than replacing the probe on a higher end model such as the Hanna most people prefer.