Yes. Dosed correctly and not counterfeited, or easy to tell if it is counterfeited. What does the Primotest run these days? Last year I had some, I think it was like $18 an amp. Ten of those is about the same cost as what 10cc of Aratest 2500 will run me. I know it's steep, but there's a lot of greedy fucks around here. I'd go with Primotest if I knew it were real.