I share the skepticism, but improving the composite signal is precisely what it advertises. I imagine it's not worth the cost, but I'm still curious if anyone has tried it and what results they've gotten.
I'm going to assume that once a composite cable enters the equation, the "loss" of information in the image cannot be recovered, and all that's being done to "clean up" the composite image is to simply get rid of dot crawl (if it can even do that).
But still, as an economical alternative to NES RGB mods, if such a device does get rid of dot crawl with minimal lag and at the right price, I'd buy one in a heartbeat even if the image still looks soft and washed out. I was hoping XRGB Mini would eliminate the dot crawl, but alas, there's still a lot of noise via composite. And now that I've seen what RGB is capable of... not having my most cherished old school console in RGB is a bit difficult to endure these days.
But, on the other hand, other than mere price, there's something in my heart that I don't like about using palettes in an RGB mod that originate from an emulator. The purist inside me is a bit conflicted about it.
(Oh, who am I kidding? I'll probably get the mod and never look back.)
Edit - On another unrelated note, I have a request if it's not too much trouble:
Can someone post close-up photos of a 480p-native game running on a 480p-native CRT? I have not recently seen what this is really supposed to look like, and I'd like to at least have an idea as to what this looks like under the most ideal conditions so I can attempt to replicate it in my setup in some way. 480i and 480p are so tricky to do justice. I would like to know how much pixelization a 480p image should have when output natively.... I jumped into 1080i-land in like the year 1999, and then 720p-land way back in 2002 or so... which means I've never had much personal experience with an EDTV display.
Don't ask me why we had a HUGE 1080i CRT back in the 90s (it legitimately weighed over 250lbs)... but man did it upscale shit better than any other HDTV I've ever seen, may it rest in peace. :*(