I’ve bought a few boxes on this and seen some videos. I think their 9mm is actually pretty good. The larger they seem to get the more trouble they have with expansion. I almost bought it in 45, but according to lucky gunners ballistics it didn’t do much (it was also fired out of a small barrel, so that could be it).
I’ve scene videos where this ammo struggled to expand through clothing. (This is 10mm).
There are two reasons it’s really good ammo. It’s usually way cheaper, and it is a hollow point that shoots. My home defense ammo was Sig V-Crown for some time (40 cal) I recently switched it to HST (this is my typical carry ammo).
I’ll just say this. For me to get HST I’m paying about $25 (at a retail store). You can get V-Crown for around $15 (at the same store). 9mm seems to be a good choice, 40 is okay, I personally would not buy the 45. From my experience, the stuff feeds and shoots. I would confidently carry the 9mm. Over penetration is slight concern the larger the caliber (this could be because some of the tests I’ve seen where done with smaller guns).