The world-leader SM900 magnetic formula now available also on the cassette format. Perfect results on Tape-1 (normal,or ferid oxide) setting.
Despite being Ferric, these tapes are much better than NOS Chrome tapes I've used so far. I am even using these without dolby and the background hiss is more than acceptable. I had excellent results with classical music.
Each side is actually 33minutes (thanks RTM for the bonus), tracks start after 7s which is a few more seconds than usual.
A word of caution though: I had to adjust the bias in order to obtain the best result. Usually ferric tapes do not require bias adjustment, but these do sound much better with a bit of tuning.
The recording experience is amazing. I'm overwhelmed by the quality and final result.