Unfortunately I find Pilot G2 to have loose tolerances between the refill tip and pen body. It's like 1.5-2 thousandths of an inch, compared to 0.5-1 thousandth for Uniball and Pentel bodies. It makes your writing a bit sloppier and more effortful.

I believe the Uni-ball One is a better pen body in every way. Tight tolerances. Well-built, hinged steel clip that provides superior fidgeting. Nicer clicker haptics too. I don't love the ink that comes in them, but they take Jetstream SXR-7 and SXR-5 refills. You can get both of these from JetPens.