"Not sure about this one." star star star_border star_border star_border I bought this a couple of months ago. Like the reviewer above I was unaware of the hole in the base. I suspect this is to allow for expansion whilst cooking. Annoyingly I didn't find any noticeable difference as to the cooking ability over a standard single skinned pan and when washing up it is difficult to get the water out of the little drain hole. My longer term concern is if this leads to the pan rusting through or failing due to residule amounts of water in the base. I personally wouldn't buy again. Roland - 29 April 2011 support_agent A note from the team Thanks for placing your revioew. I'm sorry for the disappointment and will be in touch shortly to help.