Apart from the fact that its shape does not suit me (too small), it adds nothing to pick her on my archtop (note also applies to Jazz I and Jazz II more rounded at the end). He made the same sound as ordinary plastic plectrum, I appreciate a pick off adds a touch of color to the sound.
I will not make that choice, I will not even try the XL version.
I continued with my Dugain wood and Dunlop Dunlop Big Stubby Jazztone 207 waiting to try one day maybe Andrea Pro Plec.