Having bought this vacuumed packed mattress for the first time I was pleasantly surprised at how fast it expanded after opening the packaging.  I bought the 6" only because the 8" was sold out.  The 6" is great for a child but 8" would be better for adults.  I plan to purchase a mattress topper and it will be fine for me.  I slept on it about 20 hours after opening.

Pros: All in all a great product for the money.
Cons: 6" would be better for children and 8" and larger for adults.