Thats interesting mypetearthling, Glad its not just me!
Unfortunately if they fail after a few months you cant alter any ebay feedback as far as I am aware. I suppose its a warning about buying from ebay really. directdampers have no tel number or address so they are selling junk and...
I cant help with reliability, but thanks for the tip about directdampers. I was going to buy a whole load to fit in customers kitchens but will avoid this firm. I take it you have given them a few days to reply