Hanna test kits? Good or bad

[Dunnman39]

I was looking at the digital hanna test kits and was wondering if they are efficient. I am color blind to some colors so it's hard to deceiver the right color.

 

[BetURWrasse]

Alkalinity and Phosphate have been good for me. I never bought the Ca because of the seemingly endless bad reviews

 

[jaws789832]

I have used the alk and phosphate for about 3 years now and love them. I just bought and used the Ca today for the first time so the verdict isn't in yet. It was easy to use but the reading was about 60ppm higher than my salifert ca test kit. tried it twice and both times it read higher. Not sure which one is right though.