clutchless

When I first got my Tracer I was less than smooth with my gear changes while I was finding the bite point of the clutch so I tried clutchless changes. They were very smooth going up the box, even from the lower gears. I don't do it now I've got used to the clutch but I was surprised at how good...

How many of you do this? Seems quite easy to me but what are the ramifications??