As for me, I got AVR 5550 from Harman/Kardon since 2005. Set the 7.1 speaker position per Dolby suggestion: I enjoy Dolby/DTS for DVD back then, but never it's other upmix features (including Logic 7 and PLII).
After almost a decade the setup just collecting dust, and I almost got bored with stereo setup (mostly listening to headphones on-the-go), then something nice happened.
I read about Toole in this forum, then got curious with Toole's own setup speaker arrangement (later I found is just as he described in Chapter 15 Audio Reproduction - 5.1, 7.1, and 9.1setup).
After reading his book; been tweaking with speakers position since, and got satisfying result after trying to replicate Floyd Toole's Sound Reproduction suggestion per Chapter 15, which is to put the surround and rear surround in 7.1 into more forward relative to Dolby Suggestion (I put my LCR in -22⁰, 0⁰, and +22⁰ respectively). Then, at the beginning, reluctantly move my side surround to around 45-60⁰ and the rear surround at the 135⁰.
Then I aim the speakers per Dolby Suggestion for Comercial cinema:
1. Decide the the Reference Listening Position (RLP) at the 60٪ of the room length (best location to avoid room modes).
[2. Use appropriate display size from the RLP]
3. Measure the width of the RLP (1/3x side surround inter-speakers distance), and the length of RLP (1/3x distance between foremost surround and the rearmost surround, in my setup: thw distance between my side and rear surround speakers).
4. Aim the LCR into the centre of RLP.
5. Aim the front(ish) (side) surround into the front adjacent corner of RLP
6. Aim the rear(ish) surround into the adjacent back corner of RLP.
7. Level matched.
8. Sealed them with EQ according to the + Amroc Calculator and RT60.
Then, after almost 20 years owning that AVR, I really can appreciate the Logic 7 upmixing My Roon Library Stereo files (from CD rip and Tidal - DAC - Stereo RCA - AVR5550)
I try move my chair. Change listening position without changing any of my setup. Still got balance result. Really fun.
I replicate the method with Dolby Surround setup in my other room; using Denon 1700 Reciever (7.1). Got the same result. All the speakers "gone". Only blissful moment enjoying the program material (Multichanel Music source; as well Stereo source upmixed with Dolby Surround)
My teenage daughters joined me, throw me out of the sweet spot, I still got balance result. I move to second row. Still got balance sound. My daughter and I move around the various sitting Position. All seat is equal now. She said "what did you do?. I can enjoy it now outside the "money seat".
My take is: I follow what Toole suggest in his book, something that is coined according to years of various chronologicaly described research, and the result is simple setup, reliable to be replicated; make system "gone" and enjoyable. Then the program material become the centre of attraction. Be it music or movie.