Can I sleep on my new Tempur-Pedic mattress from Gallery Furniture the first night?

The answer is absolutely, positively, without a doubt.

Why would you buy it? It's kind of like saying, can I drive my new car when I buy it?

Absolutely, sleep on it the first night. You'll sleep great. Maybe a few adjustments need to be made, but the Tempur-Pedic mattress is made for you, made for comfort, made for deep undisturbed sleep for you all night long.