I did not see that coming. I don't think the market for GB(C) flashcarts is very large these days (if it ever was), so you only see one man operations making them as they are pretty simple to make. But if this can compete with EverDrive at half the cost, much like the EZFlash Omega does for GBA, I'm all for it. And I have been toying with the idea of getting a GB(C) flashcart to try out LSDJ on my old GBC, if I can even find the damn thing. I'm sure I still have it because I saw it in a box at some point. Just not sure where. Maybe even getting a backlight modded DMG or two exclusively for LSDJ usage, but I can't really justify that if I don't even know if I'll use it more than once or twice. I just love the way LSDJ sounds in chiptunes and combining it with some other "instruments" and a mixer, the sky is the limit for what you can make.
finally an alternative to the overpriced everdrive gb.
I'm still holding my gb smardcard 64m because the alternatives are just too expensive. the convenience of sd cards doesn't justify the price when the one I already have works just fine. that may change if the ez-flash jr. has a nice price.
The El Cheapo SD isn't too expensive IIRC.
Edit: Looks like $50, or $40 if you preorder v2.2 which is shipping in January. v2.2 has the benefit of not requiring a battery for saving, but still lacks RTC as all of them do. Well worth it for the price though. Firmware updates supported and provided free of charge.
This post by BennVenn though suggests that he can do RTC quite easily (and cheaply) and would be up for it if there is demand:
https://www.reddit.com/r/Gameboy/comments/4wtge3/everdrive_gb_vs_elcheapo/d6d2myv/
So show your interest I suppose.