Ammar D.
The ultra flex nib is okay at best
The ultra flex nib is okay at best. It’s mediocre in quality, Very tricky to use and if one is not careful will bleed ink substantially when flexing it.

Excellent
Based on 483 reviews
Honesty, pricing, process and quality scores appear once 5 customers have rated them.
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Fountain Pen Revolution LLC (fprevolutionusa.com) has 483 customer reviews on Folks Told, with an average rating of 4.7 out of 5.
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Ammar D.
The ultra flex nib is okay at best. It’s mediocre in quality, Very tricky to use and if one is not careful will bleed ink substantially when flexing it.
Robert S.
Had to play with nib to get one of the pens to write.