Edit:
I've been using this app since before it was available on Steam (it's still free on github, the steam app is essentially just paying for convenience now). I've also bought the donation "DLC" before it was paid because I appreciated what this app has done for me in my 7+ years of using VR. I use it every day and would never go back to a VR without its functionality. I cannot recommend it enough if you spend a lot of your time gaming or socializing in VR. My hours used should speak for itself in this regard. And please, if you have issues or can't afford the product due to your situation, please join the Discord or speak to the developer. He's a very understanding person and tries his best to make sure everyone has a good experience.

Original Review (Apr 14, 2020):
I've been using this VR overlay for the last 2 years and can't recommend it enough. I'm so glad it's finally available on Steam so it can get the visibility it deserves (and so I don't have to keep manually updating it every release :D). The developers are always adding new and useful features as well as fixing any reported bugs. I probably have around 4000 untracked hours of using this overlay at the time of posting this review, so I can definitely vouch for its usefulness. If this was a paid overlay like some of the other VR tools on Steam (it isn't, kinda crazy considering the amount of work that has gone into it) I could have spent well over the price of a AAA title and still would have gotten my money's worth.