I bought one for DS. He'll sit in it and look at me with the goofy "OK, mom, just what are we doing here?" look on his face. He likes it for about 5 mins, then he is done.
The Exersaucer on the other hand, has become his favorite thing in the world lately. He will stay in that thing for as long as I let him. It's great if I'm helping the kids with their homework or trying to cook.