I'm really interested in the caliber.
It seems like RIA might have some real potential to grab the "small, fast, and loud" folks who are not only seeing cheap ammo for their 7.62x25 dry up but feel that non-surplus ammo may be hard to find if things continue to escalate with Russia.
Also, while the FN does something very similar, their guns are quite pricey. The 5.7 ammo IS on the shelves at some places locally but at prices that would drive most to purchase online anyway. So not having it readily available to feed is a bit of a moot point. I do like that the ammo is made here state-side.
Finally, it's a 1911. As much as I like other guns, it's really hard to beat a 1911 for shootability. PLUS they give you a 9mm barrel and spring. The end result is a very cool oddball cartridge that MAY fill a niche. However, even if the TCM completely dies you have the option of either fabricating your own ammo from common components OR just saying toheckwithit and converting it to a high cap 9mm.
It's certainly on my list to try. I think about the only thing I might change is that I would like to see it offered in a single stack for thickness sake.