I'm a big young fatguy.  I'm not so fat it affects my mobility, but I couldn't fit through the rock in the Fairy Glen to reach the top of the rock, which was disappointing.  A couple of years ago I was able to get "Economy Comfort" on KLM for an extra 5 or 8 inches of legroom, and it was totally worth it.  The normal seats were okay, but if you can spare the ~$175 each way, it's more relaxing.
	
	
	
"Kitto daijoubu da yo." - Sakura Kinomoto
	

