I must say that I am very impressed with the latest version of KISSlicer (1.1.0 RC1a - available from the forums here: http://kisslicer.com/forum/index.php?topic=489.0
- not yet available from the downloads page).
I've only tried a few prints but am very impressed with the results so far. I was printing out four plated Thingiverse Cube Gears ( http://www.thingiverse.com/thing:50716
) and even though I accidentally put in parameters which were way too fast it was printing much better than Slic3r at slow speed.
I was seeing better overhang performance and most importantly much better surface finish (no blips where the head travelled to the other plated objects). And fast, boy it was about 5 times faster to slice on some stuff on my machine.
Some of the interesting features it adds:
- optimized more than Slic3r to avoid crossing perimeters where possible (this was described in the recent RepRap magazine http://issuu.com/garyhodgson/docs/reprapmagazine_issue_1?mode=window
- backtrack wiping when it does cross perimeters (it backs away from the perimeter in order to wipe the hot end before crossing a perimeter to avoid string)
- improved overhang performance by allowing you to do the inner loops before the outer loops (which means the outer over-hung loops have more to stick to)
- perimeter overlapping to minimize seams (I have't experimented with this one yet - it was just added yesterday)
- minimum layer times (still not perfect for very small layers but better than nothing and can also use a wipe pillar to help here)
- wipe pillars for dual extruders (wipes head in a circle using an extruded pillar when changing extruders)
- reducing the temperature of non-in-use dual extruders to avoid oozing
[Although multi extruder support is in the registered version only (which is pretty reasonable at $42US)]
Slic3r will probably eventually add a lot of these features over time but I think I'll be using KISSlicer at lot more in the near future.