So I'm obsessed with sleep...

DS has started napping again after a brief hiatus -- hallelujah! But, he consistently only takes a morning nap and it's reeeeaaallly long: almost three hours!

His nighttime sleep is pretty good, although late (10:00-9:30 with two brief wakings to nurse) so I'm finally ok with the amount he's getting total, but should I be concerned that he's awake for such a long stretch during the day? He does take catnaps throughout the day, but refuses to go down even when I read his sleep cues really well.

Hmmmm...advice? Anyone else have this?