I saw that and jumped on it (with the extra $20 off even!). Makes Tidal actually a good deal - CD and better for what most people are paying for lossy. Interesting that it's a Best-Buy-only deal.
So anyway, I now have both Tidal and Qobuz. I'm enjoying Tidal's playlists,and while they tend to push hip-hop/urban/pop heavily on the front page, they're playlists are surprisingly good in other genres as well. And the personalized ones are much better than what I was getting on Spotify (not to mention Qobuz, who don't offer personalized playlists).
Also, there are subtle differences in the sound quality - Tidal sounds a bit warmer and more analog-like to my ears, while Qobuz tends to be a bit clearer and more analytical.
So at this point, I tend to use Tidal for casual listening and "mainstream" discovery, and Qobuz for more critical listening as well as Classical and World discovery. And I like having both of them because often they have different versions of some albums - different mixes and/or masterings of otherwise identical albums/tracks.
Since at this point I've no prepaid for a year of each, I'll have plenty of time to compare over the long haul, and we'll see come next year if I decide to keep both.