A really impressive feat for the Dolphin team. The emulation is accurate enough that it not only matches the Gamecube visually, but it can communicate with it over the network without issue, and no noticeable lag in doing so.
Dolphin is one of the most impressive free software projects out there. They get so much right. From programming (just look at this video) to release engineering (their build infrastructure is top notch), to marketing and communication (their monthly progress reports are very well written for both technical and non technical audiences).
And to top it all off, it’s one of the more inclusive projects where women aren’t just welcome, but actually celebrated for their skill (have a look at https://dolphin-emu.org/blog/2014/08/31/dolphin-progress-report-august-2014/ for example).
Every time I’m seeing news about Dolphin I’m nothing but impressed with the project.