I bought for marking test paper (red ink only). Used it 2 times and it was enough for me. Even though it was an inexpensive pen, it does looks cheaply made, very scratchy, skips and the bar code on it kills it for me. Will keep for glitter ink or as an emergency backup.
The preppy works very well and consistently. I do prefer the prefer the prefounte as I think that cap looks better, and the overall pen has a cleaner look - the preppy has the name in big letters on the side and also a barcode - the prefounte has no stamped barcode and the name is written nice and small on the cap. But nonetheless the preppy is a very good inexpensive pen.
This is a great inexpensive pen. I try to keep one on hand for shimmer inks because they flow smoothly with little clogging.