While I don't own the specific gun in question, I do carry a .45 of about the same size, so I can comment in general about using a mini-pistol for self-defense.
Shooting a tiny pistol accurately and effectively is not easy. This is particularly true if the tiny gun permits a grip with only trigger-finger and one-and-a-half other fingers, and if the mini-pistol fires a reasonably powerful cartridge (like the 9mm or .45).
Recoil, which will include both flip and twist, is difficult to manage, which means that your second (and subsequent) shots may be delivered too slowly and inaccurately to be effective. You may also find yourself developing a flinch.
You will have to do a lot of dry- and live-fire practice, and you will have to continue to practice consistently and daily while carrying the gun.
Presentation from pocket carry also requires lots of practice, if you wish to become quick and sure.
The good part is that it'll be so easy to conceal, for daily carry, that even you won't notice that you're concealing a deadly defensive weapon.