The API master test kit is one of the best you can get. It last longer and is a lot more accurate than test strips. More bang for your buck.
They also have 6 in 1 strips that test PH, GH, KH, Chlorine, Nitrites, and Nitrate. Then a separate ammonia strip is available.
They also have Ammonia, PH, and Nitrite alerts that go in your tank and give you real time feedback.
These are great for new cycling tanks, but are pointless in an established tank.
Honestly my tap water when mixed with Prime is so consistent, and my tanks are so established the only thing I really check for on a regular basis is Nitrate.
I only check the other chemicals if the fish give me a reason to. (Rapid breathing, looking stressed)