I tried it out yesterday and had a great experience with it, very low resource usage at 60FPS and Punch Out's new perspective makes the game feel closer to the Wii entry funnily enough. The emulator's easy to crack, I gave it a go myself despite purchasing it, all you need is a steam api dll injection.
I hope this 1.0 release means more community support with custom game profiles so more games get this treatment, it actually makes them feel really fresh even though they play the same. I do recommend it and actually don't regret purchasing it. Dolphin's takedown was a special case because Dolphin includes a dumped decryption key in the source code, while NES emulation more heavily relies on the ROMs to work and as others have mentioned famiclones are a thing worldwide with no trouble as both the software and hardware is easily replicated with clean reverse engineering by now. I think there's little worry for a Nintendo takedown on this project.