I will never use Kickstarter again after the battery fiasco, which never got resolved.
I've backed over 60 kickstarters. I've had unfulfilled kickstarters, some that seemed shady, that where people went in over their head, some that ran into unexpected complications, and successful ones.
I will still back a project here or there. These days I stick to kickstarters that are either simple to execute (playing cards most recently) or campaigns from people that have already successfully completed one (like with Peak Design's suff).
In this case, (tl:dr at the bottom) while this is the first I've heard of Nomatic, it seems like a fairly safe bet, especially if you're with in the US where there shouldn't be any shipping issues and unexpecting or surprising import fees (I've seen complaints of high, unexpected fees from backers in Europe post-COVID). They have eleven projects on kickstarter already, most of them some form of bag, including more complicated roller luggage. If I didn't already have more bags than I need thanks to Peak Design, I personally wouldn't be concerned with backing this in terms of seeing a finished product in a reasonable timeframe.
With that said, you're saving $10 to $70 dollars off of MSRP, plus sales tax but having to wait until October-ish to get it. In six months, personal circumstances might change and you don't want it anymore, or you found out you needed a bag sooner than October and had to buy one before receiving this product.
This product will make it to market and it may be worth it just to wait and pay MSRP because of those unknowns. It isn't even uncommon for kickstarter product to make it to store shelves before backers get it in their hands. And retailers may even put it on sale, negating the Kickstarter backer savings.
tl;dr - If I was in search of a bag (I'm not), I wouldn't decide against backing this because of fear I wouldn't receive it (I'm pretty sure I would considering their history). But rather that I might not need it in six months time and the savings is minimal and may be negated due to retail sales.