I had one, and not at all.
Don't get me wrong, the premium versions are very nice pens. They even write well. The way a Sharpie|Pen writes well.
In fact it has pretty much the exact same tip as a Sharpie|Pen. Which, again, is a very good non-FP writer.
The Parker 5th Tech refill costs about twice as much as the Sharpie.
That's not the point, though.
The point is that Parker slapped a Halloween costume on a felt tip and called it revolutionary.
I sold mine a while ago. If it was a more 'honest' pen, not pretending to be something it isn't, I'd probably still own it.