I think the quality/durability will be the standard by which this thing sinks or swims. I'm nervous that this "battery free" loader will be too closely based on the Cyclone, which is rough on paint and to my knowledge, still has issues with the ratchets which haven't been resolved.
Personally, I love the idea of a marker that doesn't require a blimp on top but also doesn't require the unreliability and added cost of magazines, but I'm also nothing some obvious downsides. With the loader position I feel like it will cause mask interference issues aiming down the barrel, and I wonder how certain sizes of tanks will fit.
I think the price point corrects the biggest flaw of the defender which was the exorbitant price for a niche or curiosity marker. At ~$300 I think more people would be willing to give it a shot than the initial $1000+ cost of the defender.