Agreed! I had one of the inexpensive ones, and you'd have to let it settle for up to 15 minutes to get a reading. It just wasn't worth it at all. I ended up adding another pH probe to my Apex controller and monitoring that way.Not really.
They are very inaccurate.
The better ones that are sold for more than $175.00 with probe, storage, and calibrating solution, are more accurate.