My grand baby wore the kimono style shirts with mitten cuffs in the hospital.  They made changing and swaddling very easy, so we were anxious to order some before the baby came home from the hospital.

PROS:
They work.  The baby sleeps very well in these + swaddling.  Mission accomplished.

CONS:
Fabric is thin.  But it makes them dry faster in the dryer.
Kimonos are short (not for tall babies) and arms are long.  Our baby is little, so they work.  We've found that all Gerber products run comparatively small.  That is good for small babies in the 6 lb. range.  Other 'newborn' clothing is too big for our little 6 pounder..