I purchased a Sealy Memory Foam mattress, have not received it yet, any opinions on this type of mattress?

Not sure about your specific type of mattress, but as far as memory foams go... you either love it or hate it. Some find it extremely comfortable, while others complain that they feel "encased"...

Personally, I'm a huge fan... I have a 4" memory foam topper with a down comforter topper... so it's like sleeping on a giant feathery marshmellow...

I'm not too sure about a sealy but I have heard that with the tempurpedic mattress, people wake up sweaty. Plus if you weigh a lot, you may have a sinking feeling into it.

I've heard they are very good although I've never slept on one personally.

They are suppose to be very good for your joints and mould around you to support your body shape.