I purchased the half price subscription through Best Buy last year. Worked without issue. It's a good deal if you plan to use Tidal.
Ultimately, for me, I didn't love Tidal and now I have to insure it isn't going to auto-renew. Once I get confirmation that it is not going to renew, I'm going to give Qobuz a trial.
Right now, I stream mostly Radio Paradise and Spotify because I really like to catalog and user interface for both.