Reliability, feel (how it fits my hand), accuracy, and support are my concerns.
Reliability - both immediate (does it jam?) and long term (is it durable, or prone to breakage?) are uncertain right now.
Feel - no way for me to tell without handling one myself
Accuracy - probably OK for a defensive pistol
Support - a HUGE question mark; a lifetime warranty won't last longer than the company does.
When I saw the manufacturer's name - Rost Martin - I immediately thought of the late actor in The Wild Wild West TV show, "Ross Martin" whose character Artemus Gordon played second fiddle to Robert Conrad's "James West." His character was smart in the show, and the actor himself was a sharp guy in real life.
In any case, the ONLY motivation for buying this pistol over one of the other polymer 9's on the market is the price point - and I'm fortunate in that funds aren't so tight that I can't afford another $100 - $150 dollars to buy a pistol with a known track record from a well-established firm that's unlikely to disappear any time soon.