I did notice the gun has more kick to it than what I thought should be expected from a "small" pistol caliber. It kicks more than expected because the carbine is very light, and its design. Yes the charging spring is strong and is hard to pull back. I have only about 400 shots through this gun. I have had it to the range several times to make sure it was reliable. The only reason I got it was for the wife. I leave one in the chamber, so I don't have to worry about charging it. She can shoot it no problem. I don't shoot it much because I don't like the blowback of powder in my face with me being left handed. My dad is also left handed but he says he doesn't get any powder to his face. I have read a few people have problem with the charging handle slapping them in the face, But nothing that could not be fixed with form.
Its a great little gun. Mine is 100% reliable. They are cheap, I paid right at 300 for mine, and the only reason I have it is so the wife can use it for home defense. Yes their are better guns out their, but she likes it, she is not scared of it, and she knows how to shoot it. Just get her something she enjoys shooting.