I have bought over 50 pens so fare. My favorite is the Novo 4. I have about 25 of them now. I was able to get 6 in Blue! The rest of my Gsnsulin/Convi Pens, v1, v2, v4, Xulin, etc. I gae to my friends. The Novo just feels way more solid than the rest. I also tested them because everyone says they are “off by 8%”, none of mine have been. Maybe it is the cartridges I am using, I didn’t know. But none of mine have been off by more than 1 unit at 25 units.
But everyone has a favorite pen. My suggestion is buy at least 1 Autopen and 1 manual pen and see what you like best.