My wife got me a green one of these for Christmas and had a couple shaves with it now. It's an interesting little razor. I'm not usually a big fan of really aggressive razors and this one is pretty aggressive. I have a box of Perma Sharp half DE's already open so I used one of those. I rode the cap, using an extremely shallow angle as well as a very light touch. Got a really close shave with it. Like R41 level closeness. I was just starting to feel a bit of stubble after dinner last night which is at least a few hours later than normal. I only got a little alum feedback from the shaves. That's mostly because I was very careful and I know how to shave without using any pressure. I wouldn't recommend this razor to someone new to traditional shaving but for someone with a little experience it can produce great results.
I love the idea. A RazoRock Eco with Injector blade. And a lot of blade feeling ... https://www.reddit.com/r/shaveoftheday/comments/mfrllp/modding_and_shaving/