I absolutely love these Pajama jeans!  These jeans are so soft and look very much like a regular pair of jeans.
Yes, it is kind of hard to wiggle into them, but once they are on, they feel great.  The drawstring is helpful to tighten the waist and to keep the pants in place.  I am 5"4" and weigh about 140 lbs, usually a size 6 or 8.  The mediums fit perfectly.  The length is also good, if not slightly long.  They do stretch out a bit once you wear them for a few hours, but they do not get saggy.  They did have a strong chemical smell at first, which has faded after several washes.