Pentel is my only go to refill. I have custom made roller ball pen's from Salado, TX., I'm sort of a pen and fountain pen "snob". Pentel makes me happy because of the BOLD, NON SMEAR trait of this refill. I keep 12 refills in my pen display case and that is the ONLY one I use or tell folks to use. My oldest grandson Trip, has now joined me in collecting my custom pen's and I loaded his with a new Pentel 1.0 Blue Energel cartridge and sent him an extra in his case. My comments to Trip who is 15 yrs old and very responsible. This custom pen was designed for the Pentel Ener-gel cartridge, use non-other. Pentel, I appreciate quality, I appreciate excellent service and PENTEL you have always come thru. So today I'm ordering another 12 for my inventory... I switch my pens daily and thus one gets low, all of them are low. I hand write lengthy reports daily, then transcribe them to my computer. I'm never let down by PENTEL..... Heck, I could be a field tested for you all.
Be Well, Keep up the Excellent work... My only regret is that I could only give you a 5 Star Rating.. Need's at least a 10!