For 130$... this is a steal!!!! Ppm probe and all included.
The ppm pen is pretty bullet proof, I've had mine at least 8 years and it is rarely too far from calibration
The ph pen however I did have one fail on me and the 2nd was a little wacky and read slow. I love my leap probe it is working great
TDS the cheap ones works very well I never will buy one more expensive then 20 bucks my old one works for 3 years cheap one! Bluelab is a problem because you can't replace the electrode!
This one I here is great https://www.amazon.de/Apera-Instrum...=1641563365&sprefix=ph+meter+,aps,185&sr=8-16