First response opk

Hey ladies! Just purchased the first response ovulation tests, (7 pack) +  pregnancy test, so we'll see how this works, wish me luck.. If anyone has any pros or cons on the first response Please let me know.. It's non-digital so if anyone experienced anything to be cautious about, respond :) it's CD 9 today I will begin testing on CD 14( 31 day cycle) thanks so much :)