Good for a quick check but expensive with only tests.
Worked exactly as advertised. But make sure you know you are only getting two tests as stated clearly on the product page, after which the vials are essentially trash. In hindsight I would have saved my money and just bitten the bullet and gotten a drop checker, which i eventually did anyways. Could have put that 5 dollars towards another fish or some plants :D
Quick and easy, just fill it half way shake and check the color. It's almost like an immediate drop checker. Great for spot checking!