Memory foam is a brilliant invention!
I used to wake up every single day with an awful stiff neck and random body pains from poor sleeping at night. Now, thanks to my awesome Charter Club "Visco 6-Zone" Mattress Pad and my Isotonic Side Sleeper Pillow (both made out of that amazing memory foam), I wake up fully rejuvenated. I no longer have stiff necks or "TMJ" problems. I feel like a whole new person!
I highly recommend (at least) the mattress pad to everyone. It feels so good on your back because it is firm enough to give full support, yet is soft enough that it molds to your body shape. It's also a much cheaper alternative to buying a full tempur-pedic mattress.
I bought my mattress pad on sale at Macy's. The Isotonic Side Sleeper pillow was purchased at Bed Bath & Beyond.