I like that the markers fit snug around a 1inch base without making it any wider. If you are using condition markers that are plastic or metal rings, your character has to wear them like a sash if they are going to be able to stand adjacent to another mini or obstacle. This way we can still see all of our players painstakingly chosen/painted characters. Although of course with larger monsters you still have to hang them off of the mini.

They are pretty easy differentiate them at a glance too if you print them in color. I might recommend printing them on tougher than average paper too if you want them to last a long time though. An office supply store would let you print a couple of pages on fancy paper for a buck or so.