I like them. I have rarely heard of any issues with them in a reef tank. They like to eat poop... which not many other things out there do. 
  
Here's how I think of it: If its larger than a couple inches, if I can... I'll take it out. I keep the smaller ones around. 
  
As for getting him out... a trap is easy. But the good old plastic tongs and a quick hand are the fastest and easiest way to get him. 
		
	
		
		
		
		
			
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They call it addiction for a reason... 
			 
		
		
		
		
	
		
		
	
	
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