I have a bit of experience and the answer is that it really depends on the age of your DAC. Reclocking older DACs (10 or more years) really helps, by a lot.
However DACs in the modern world have superb jitter rejection already.
The Wyred4Sound is a unit I've tried myself Works great, but with older DACs. I absolutely cannot hear a benefit with new DACs at all. YMMV