<p>You clearly dont value the opinion of the people on this website so why are you even bothering to continue posting? </p>
<p>My biggest problem with using a grad student is that there is no proof that the grad student is capable of succeeding in research and therefore is not in a position to vouch for someone else. Unless there is somewhere for the grad student to list their credentials when they submit the letter.</p>
<p>Also for all the adcoms know the grad student could be your best friend which would definitely be inappropriate.</p>