I really like these pens. Love the needletip. The gel ink flows smoothly and doesn't smear. I "graduated" from the Uniball and the G-2 pens to these RTX gel needletip to my new favorite pen. But 2 of the pens came apart and could not be screwed back together. Very disappointing, so taking away a star.
5/6/2017 Update: I carry pens around in my pockets. Sometimes I fumble with them. With these, they came apart and could not be put back together again. I bought a box of them and could only use a few of them. Such a shame, because otherwise they write really well and I love the precision of the needletip. But if I can't depend on them to stay together or screwed back together, they're useless to me. I might superglue them back together, but I won't be buying them again. Took away 2 **