Just refilled my Asvine V200 pens. I go through almost a full fill of #ink in them every 12–13 days. I didn't think I would be filling these #fountainpens as often as I am, but here we are... Guess I just #write that much with them.
Left to right these pens are filled with Diamine Jet Black, Oxford Blue, Aurora Borealis, Writer's Blood and Imperial Purple inks. To their right is the Jinhao x750 filled with Wordsworth & Black Lavender Purple.
I haven't had any fitment issues with my pens...and I've bought around 20 pens from them over the last 8 months. From what I've seen / heard (mostly from DoodleBud's videos), Asvine seems to be paying a lot of attention to the feedback they are getting, and have consistently been improving.
As for the nibs: they have improved their in-house nibs to the point that the real roulette is getting non-Asvine nibs. I bought one of my 200's with a Bock nib, and it was horrible. The Asvine nibs on my v200's, v126's, v169's, and v800's have all been exceptional.
Not saying there can't be QC issues here or there...but it seems like they've been working hard to eliminate as many of them as possible.