D&C 42

Of the event of "death", the Savior said -

"...that those that die in me shall not taste of death, for it shall be sweet unto them;
47 And they that die not in me, wo unto them, for their death is bitter."  (Doctrine and Covenants 42:46–47)

Obviously, the experience of death is not the same for all.  I believe that for the righteous, it will be a time of rest and peace, free from the physical ailments of mortal life.  But for the wicked, they will be amongst the wicked and Satan himself where there can never be rest and peace.