Regardless of whether an infant sleeps on the same surface as his or her parents, on a same-surface co-sleeper, in a bassinet or in a separate crib, in the same room as their parents or in a separate room, all infants should follow these same guidelines: infants should always sleep on their backs, on firm surfaces, on clean surfaces, in the absence of (secondhand) smoke, under light (comfortable) blanketing, and their heads should never be covered.
Aside from never letting an infant sleep outside the presence of a committed adult, i.e. separate-surface cosleeping which is safe for all infants, I do not recommend to any parents any particular type of sleeping arrangement since I do not know the circumstances within which particular parents live. What I do recommend is to consider all of the possible choices and to become as informed as is possible matching what you learn with what you think can work the best for you and your family.
James Spencer, a father of a 22-day-old newborn said he created this product because he was always worried about his daughter at night. "by designing an infant sleeper that removes avoidable risks associated with early infancy I slept easier," he wrote on the page.