MK,
I have a few lengths of the 1.8mm, one in hi-vis green and one in orange (thanks to Bill Shakespeare from New England Ropes).
I like the colors, it makes it easier to see those high shots. The color fades pretty quickly though.
The line softens a bit with use and there is an increase in friction because of it. You may have to use a heavier bag.
Bill had said that they were trying to deal with the above issues, but I have not heard if they have done it yet.
TMW