I had two EF 70-200s, and they sort of bookend my trajectory from ignorance to experience. The f/4 non-IS was my first L lens (in 2012) and it wowed me with the image quality, every shot I took with it seemed so much better than what I was used to. However I wanted more reach so swapped it for the EF 400 f/5.6. I got the f/2.8 IS II a few years later, maybe 2016, after returning a faulty Sigma 180 f/2.8 macro lens, to see if the zoom would provide similar quality with extra flexibility, but I was so unimpressed with the images around MFD that I quickly got rid of it (later I got a second copy of the Sigma which I still have).
I never did much event/portrait work so these zooms never quite fitted me - and 200mm was never enough for me (I also had the EF 200 2.8 cheap L prime and the colour fringing was too much for me). But they were certainly fine pieces of kit.