I'm using it for my app, and I never had any issues. You don't need to incorporate a company to get this certificate ( https://support.sectigo.com/PS_KnowledgeDetailPageFaq?Id=kA0... scroll down to the Individual Validation Requirements).
If your ID has your address printed on it, then you are lucky and can just take a photo of the ID and yourself holding the ID. If you don't, then you need to go to a notary and sign a special form provided by Sectigo.
Sectigo doesn't even need to call you anymore, as it was about 5-10 years ago.
The downside of the OV certificate is that Windows Defender will show a blue pop-up saying that your app might put the user's PC at risk. Good thing is that it will eventually go away after some time. For my app it took about a year.