Please share your print and g-code file size results.

So my print results are mixed, just like my gcode compression results were mixed but overall I give this a thumbs up. I think that ArcWelder has a huge amount of potential but it needs to be used with intelligence. The curve fitting algorithm by it's very nature means that you can loose some degree of fine detail if those fine details are close to the ArcWelder resolution setting, but the smoothing is great.

Example:

If I print something with large smooth surfaces like a vase or the wings of a dragon figurine, then this has a huge positive impact. Smooth surfaces are noticeably smoother.

If I print something with lots of small detail, like a small figurine with fur, then the curve fitting algorithm will end up smoothing out the fur a little and it will be ever so minorly less detailed.

In general I think that the 'pros' significantly outweigh the 'cons'. The better smooth surfaces are very noticeable but the minor loss of fine detail was only noticeable when holding two models next to each other and comparing directly.

If I'm printing large simple shapes this is huge a improvement. If I was printing something with both fine detail and larger smooth surfaces I think I would go with ArcWelder on. If I am printing a small part with lots of fine detail I will turn this off.

I am getting 35%-45% gcode compression. Their example of 95% compression will only happen in very specific situations. It is all about curve fitting to your gcode paths while staying withing tolerances. Their test file is a 0% fill cylinder so just about ever gcode segment is a circle segment which can be matched very well. If you test this with say a cube that has no curves at all, you will see 0% compression...

Frankly I don't care much about the gcode compression... If you do not have the patience to wait for a print 3D printing might not be a great hobby for you. I'm excited about possibility of smoother prints. I'll report back in a few hours with results.