Review on Sony MC90 Microcassette Audio Tapes - Pack of 6 by Darryel Tokarczyk

I was very excited to find them after finding in the past that Sony microcassettes made in Mexico are better than Thai made ones. Well, those 90 minutes weren't any better, they were a lot worse. So far, both 2-tape recordings had a very loud hiss/whistle that ruined the conference call recording. My Sony radio works fine, so the problem wasn't with the radio! I assume the rest of the tapes are the same in a 6 pack so I wouldn't recommend people buying these particular microcassettes.