It's a must have for us. We still use our glider every day for reading and snuggling.
This for us, too. I rocked DS a LOT while I was breastfeeding or just sitting around with him. It was soothing for both of us.
He's 2 1/2, and I still use the glider to rock him. Some nights, he just wants to be rocked. He wants to be rocked when he's sick. Sometimes he just wants me to sit in the chair and rock while he settles down in his bed. He loves it so much, in fact, that we have to buy a new one for the nursery because he flipped out at the mention of putting the glider in the baby's room, and him being a "big boy" without one.
ETA: I should also note that the glider was not always in the nursery. For the most part, when he was a newborn, I was out in the living room and therefore ordered a glider with neutral upholstery. The glider didn't actually go in his room until he was 7 months.