as long as the quilt fits into the 'rules' of the show you want to enter go ahead and jump in...some of the 'regulars' may scoff because it is not cotton, but, let them... the only way to learn is to try. if you enter it as a judged quilt you will receive a critique and will have better ideas of what is ok, what doesn't work and why.
if nothing else it should receive raves over the great hand quilting ;).
the judges are going to look at workmanship, technique, whether or not it hangs straight, if the binding is well attached and full to the edge with an appropriate balance of quilting...
good luck