The instrument is a little heavier than an "acoustic violin" and it will not support your shoulder rest--you will need to cut on a sponge or styrofoam to replicate the feel of your shoulder rest.

I contacted Amazon about the missing shoulder rest and etc.

This makes attaching a shoulder rest difficult or impossible depending on the rest.

Mine was missing the shoulder rest.

i am very happy with this product although my only concern was the flimsy E-string

While a professional violin does only have an e-string fine tuner, I prefer to have all four