I have used it with my Pickenflick (customer support swapped the stock bar for this one at no cost), flare is very slight, but still noticeable. Nice if you want a position still very much resembling the road bike, otherwise look for something with a bigger flare.
Valid point, but vanity aside, is the benefits so good that's it's a no brainer?
Planet x has this for £19.99 which seems like a good option to try it out
https://www.planetx.co.uk/i/q/HBSESTE/selcof-sterrato-flared-gravel-handlebar