I used to have Mizunos once upon a time and they were absolutely fantastic.  I bought these since I was in dire need of a real pair of volleyball shoes and I haven't been disappointed.  There's good room in the front for toes. The back comes up over the heel far enough to hold on but not far enough to dig into your tendon.  Overall they feel good and are a light weight shoe.  I am definitely happy I bought them.  Good shoe for the price.