And who is using something different? This is also what I have, but would be willing to pay more for something "better". I can see a lot of potential improvements in the rolo-flair, and might be willing to pay for them, but I haven't seen the alternative. (not willing to type a book to describe)
I think this is a case of "good enough" for our use case, until you intend to do thousands of flares for tens of thousands of dollars?
The Papco Rotomaster #600 is what I use. It’s a very capable flaring tool that will make perfect double or single flares. They pop up on eBay occasionally.