The Safari's plusses are: they are amazingly smooth writers (if you get a good one), the nibs change easily, and the pen's construction is rugged.
The minuses: My 2 Safaris, one medium and one fine point, draw lines that are not very precise. In fact, compared to my good pens the lines are downright mushy looking. Not a big deal to me though. For the price of the pens their smoothness more than makes up for the lack of crispness. Also, judging from my own experience and from reading the Fountain Pen Network, Safaris may not be consistent in quality (despite the fact that every pen is factory-tested prior to shipping).
My suggestions: First, dip-test a Safari before buying it if you can. Next, people with very large or very small hands beware - the barrel section on the Safari is flattened where it meets the thumb and forefinger. And the grip is one-size-fits-all. It happens to fit my hand beautifully, but people whose hand the pen doesn't fit will have a very unpleasant writing experience.
Edited by ashbridg, 22 March 2010 - 02:40.