The parts that already I have bought (screen protective film, and the stainless steel wrist strap) are very good in quality, very handy, and very easy installation with the tools accompanied. The watch (my third smart ⌚️ because my wife bought me one every Christmas as present) is the only one that survived in my hand for more than 2 months (the 1st damaged in the shower after swimming pool & the 2nd when I was trying to take off my jacket, the wrist strap damaged and smashed the screen on the ground.......KOSPET Tank M2 is really like tank 5 months now.....I'm really hope to continue to prove that