The sinusoidal low noise props make a huge, HUGE difference! If you've ever been buzzed by a dragonfly, the noise is pretty similar. It's pitched very low, not at all like an anxious buzz and makes it a lot more stealth.

The bag is only a shoulder strap, and I kind of want to try and make it more backpack-like, if I can. Easier to get around with on a bike, easier to carry on foot.