Anyone into cassettes?

Yes indeed, have a NAK DR-8. It makes my tapes sound great, even the ones recorded on other decks. Most of the tapes are transfers from my LP's, R2R. Now used only for playback.

I am the original owner of a Nakamichi CR 7A. I recently had it serviced by Willy Herman. This work of art brings joy to my ears.

I have three Nakamichi decks and thousands of cassettes, along with several CD/DVD players and a high-end turntable. I find the sound from the recently serviced cassette players to be very easy to listen to and preferable to CDs when I listen through tube Stax headphones. Also, you can find cassettes at thrift stores for a quarter. Cassettes and cassette players get ridiculed on this forum, but I'm keeping mine.

I have a 90's vintage Yahama cassette deck on my rig that I use on occasion. Sounds better than ever these days in that my setup is the best I have ever had as well by far.

I have not recorded any new casettes since the 80's though when I dabbled with hifi VHS as well. I use my tape players mainly for old tapes I recorded back then and in college in the 70's. These are blasts from my past and a lot of fun to listen to still. SOund is not tech perfect, especially noise levels and high end, but still very enjoyable, more than ever. I have "ripped" a few of these to digital as well and play these now on my music server rather than via the tape decks. That enables me to do fast and easy a/b comparisons in sound quality between those tracks that I recorded originally to cassette on my college system years ago (using an Aiwa AD6550 cassette deck I bought while working at Tech HiFi back then) and tracks ripped from other sources. Lots of fun.

I had AIWA AD-F810 long time ago. It had HX-PRO in addition to Dolby C. HX-PRO was a servo on the bias. In short, bias is non-audible high frequency recorded with music that reduces distortions of the tape. Not enough bias and sound becomes less clean, too much and sound looses high frequency response. But high frequencies present in the music also work as a bias. HX-PRO allow to reduce bias by adjusting it dynamically to recorded material. As a result of that regular tapes sounded like chrome while chrome tapes sounded like metal. It was fantastic player.