If you have money burning a hole in your pocket and you like non essential toys then go for it! I did
. Does it work? Yes. Is it perfect? No. I basically use it to keep an eye if params swings too much. You still need a separate test kit(hanna) to check/calibrate so you can't rely on it solely. Like someone mentioned buy it used if you can. I also have had good luck with the abc reagents so cost to operate isn't too bad.