I have a Hello Kitty pen, and I'm not afraid to use it.
I mean look at this pen - it's amazingly well done. I wouldn't expect anything less from Uni-ball, especially with their premier gel ink pen lineup in the UM-153. And including one of Japan's most timeless characters in Hello Kitty they had to get this right. And they did.
The Uni-ball Signo UM-151, also know as the DX, is the best gel ink pen on the market, especially in the sub-0.5mm range. It has been atop the rankings in my Top 5 Pens list for ages, and is a joy to use. Pilot Hi-Tec-C owners may want to challenge you to a duel over statements like these, but their pen will likely misfire when challenging you, leaving you to walk away unscathed. I should know, I used to be one of those people.
What makes the DX so good is the consistency and sharpness of the line. It is always ready to write, and when it does, it does so perfectly. The colors are brilliant too. Uni-ball has the best non-standard colors in my opinion, just like the orange seen here.
In a non-surprising twist, the Hello Kitty Signo DX is fyling off the shelves at JetPens. Five of the eight colors are out of stock, and being a limited edition, I don't know if and when they will be back. If you are interested in picking one, or several, up keep your eyes peeled.
(JetPens provided this product at no charge to The Pen Addict for review purposes.)