Is this actually solid stainless steel or is it a coating like some on market?
Our lemon squeezer is crafted from genuine 304 stainless steel.
Does the juice squirt out the sides?
Juice does not squirt out the side of this juicer. It did not happen with lemons and limes, only with an orange which is too big for this device.
Does it require significant effort to flatten the lemon in order to extract the juice?
It doesnt require much effort at all. Its very easy and friendly for individuals with arthritis or small hands.