On the internet I read a lot of stories that encourage to prepare for a no gi contest by training with the gi/kimono. Isn't it a little bit of nonsense, because during no gi grip (holding the pants or shirt) isn't allowed. Can someone explain in details. I think I once read an article of GSP about this subject, but can't find it anymore.
I find that my no-gi fighting has become an order of magnitude better due to wearing a gi. You will find a few benefits:
Hope that helps.