I ordered this mattress topper as I made a mistake in getting a memory foam cooling gel mattress which is WAY too firm for me (side sleeper).  I thought this would be enough for me to be more comfortable, but it's definitely not thick enough.  I sink right down to the bed with little to no support.  I ended up folding it in half and it helps a bit, but my bed looks dumb and lopsided.  It's not too hot, and I have only noticed one or two feathers poke through, nothing that can't be fixed with a mattress protector cover.