HS was intimidating at first so I avoided it for ages (and the cost is a disincentive).
However, now it's all I use except when browsing DEO to find content for downloading. The main feature for me is the ability to save scenes that were shot poorly (most studios suffer from this). It can even save some 8k scenes that have awful scaling issues. Now, when a scene is good but technically flawed, instead of instant deletion I can maybe get it watchable - mostly this is fixing scale with the combo of zoom and stereo adjustment. But also the image control is excellent, including keyframes for adjusting only parts of a scene. And being able to save a preset then apply to similarly graded scenes by the same studio is a game changer.
Just today I saved "Shower Me With Love" starring Chloe Amour from MilfVR. On DEO it's a disaster, terrible scaling and shit color grading. With HS and some tweaking, it's now almost perfect and becomes an instant classic.
If SLR's competitors were smart they would collaborate and invest in Heresphere, make it free and more intuitive, and promote it as the default option for playing / streaming. However I don't have much faith in the business acumen of some of these studios, they think short term and either don't have the funds or the balls to invest in the best customer experience.