I've had one for about 18 months, think it's a blast (pun intended) to shoot and I'd buy one again in a heart beat. I actually can't think of a better home defense weapon. While it's bigger than other handguns, it is still a lot smaller than any other AR/AK available to the general public and has a lot more firepower. It uses AR mags in 223/5.56, so they and the ammo are available everywhere. It's also accurate for a rifle round coming out of a stockless gun with a 9" barrel. I can hit soda cans and trap/skeet clays at 75 yds all day long with it which is more than I can say for any other "pistol" I own, even my favorite Bersa 9.
Thunder 380 & 380 Concealed Carry
Thunder 9
Ultra Compact 9 (2+)
Ultra Compact 45
... among others