Very good quality product.I was a little sceptical but after instalation I realised-it works-it is a remedy,if you have any mechanical or tonal problems with your stratocaster.But do not expect any alteration in your sound-your guitar will sound different,better than before,but still DIFFERENT.I can say only-my old strat sounds better,notes became more separated,but nasal strattiness,glassiness is gone.If you are looking for good quality tremolo without any problems(sitar effect,tuning/pitch problems)-it is your way to go.If you are looking for strat vibe(50's/60's sound),it is not for you,keep your zinc block and change saddles.