Is this an automatic answer to snoring? No. Quite simply, there is no one answer. Some people only snore badly when on their backs, others can snore just as well on their sides.
Is this the most comfortable pillow ever? Very subjective I know, but I would say not.
However, on the plus side, this pillow supports my head at just the correct height when I am sleeping on my side. Where most pillows are so soft that after the first few seconds they sag to the point that your head really isn't supported at the level it wants to be, this pillow is VERY firm and keeps that support in place for a while (it does soften eventually, which is a pity).
Similarly, if you have a bed where the head part can be raised, this pillow is firm enough when doing that to provide excellent support when reading in bed.
So, it is not an automatic answer to snoring, but if you like a very firm pillow and/or need firm support for your head/neck, then this may be what you are looking for. Opinions on pillows are very subjective though - ask any chiropractor and they will tell you about patients who have collections of different pillows that they have built up whilst trying to find the one that is "right" for them.