I had never changed a door knob before. I was a little apprehensive doing it, and thought it was going to be hard. My old knob was wobbly, and worn. I had more trouble taking off the old one than installing this. The directions were simple to understand and all the necessary hardware was included. I put it in in 10 minutes, it fits well and is snug to my door. Seems extremely strong, and durable. Really dont think I'll ever have to replace in my lifetime. Looks beautiful and modern, very stylish. The color, shape and style all is very unique. I've never seen another like it, and have gotten a ton of compliments on it. Locks and unlocks smoothly and easily.