I gave it an 8 and I'm certainly glad I bought it. (For comparison, I gave Abbey Road 50th Anniversary Atmos mix a 10).
This is essentially a John Lennon greatest hits album (post Beatles) remixed/remastered for surround sound in the 21st century. Really like it. The mix is somewhat conservative and respectful to Lennon's originals. But the tracks sound really nice and moderately immersive.
I have an Atmos 5.1.4 setup with the x.x.4 being Dolby Atmos enabled upfiring speakers. I am not getting any sound from my front Atmos upfiring speakers. I am getting sound from my rear upfiring speakers. I've verified my system is working properly with other Atmos content. as well as Atmos test tones.
I've only listened to the Atmos mix. (On a few tracks, I switched from Atmos to the DTS-HD MA 5.1 mix and back on the fly. To me, the Atmos mix sounds slightly more immersive and spacious). The Atmos mix is very clean with the sound stage towards the front. The use of side surrounds and rear upfiring speakers is constant/pleasant but no whiz bang effects. Perhaps if I were the mixing engineer, I would have tried a more "spacey" in the clouds Atmos effect with #9 Dream (one of my all time favorite tunes). However, I'm not complaining about it.
I'm a big Lennon fan. In fact, I listened to Sean Lennon's special on BBC Radio 2 this weekend "John Lennon at 80". So I'm glad I added John Lennon's Gimme Some Truth. The Ultimate Mixes (Deluxe Box Set) to my library just in time for John's (and my Dad's) birthday on October 9th.