I've been wanting these for a while and finally decided to get a pair to wear during the milder winter days.  They're definitely more comfy than jeans; I feel comfortable wearing them just as much while grocery shopping as I do lounging on the couch.  The material is thin, but still has a somewhat sweatpant feeling to them.  From a distance, they look enough like jeans that you could probably wear them to run simple errands or hang out and no one would be the wiser, but if they're standing close enough to you, they can tell they're not real jeans.  My boyfriend was standing about two feet from me when he asked if I went out and bought Pajama Jeans.  You can clearly see it's not denim fabric; rather, just dark sweatpants with contrast stitching.  A few runs through the washer (and I wash them inside out in cold water every time), and the sweatpants effect is way more obvious.  Again, it's fine enough if you're running simple weekend errands, but these in no way will pass as actual jeans.  The cut is pretty short, hence the rating.  I'm 5'10" and these will work when stuffing them into boots, but not to wear with regular shoes.  They don't even reach my ankles.  Right now that's fine because it's still winter and I can get away with the boots, but these will probably be relegated to strictly indoor use once the weather warms up.  However, since they're not as comfortable as actual sweatpants or even yoga pants, they'll probably sit in my dresser until next winter.