The Eco is great. I use it for any long documents I have to write because it's so comfortable and reliable. I do have to clean it more often than other pens due

The Eco is great. I use it for any long documents I have to write because it's so comfortable and reliable. I do have to clean it more often than other pens due to the ink feed getting gunged up though. Also I accidentally took mine on a flight (between two sea-level locations!) and it didn't leak in my bag.