Sassy Seat Doorway Jumper.. anyone have?

I just purchased for my sis house for my dd to use when shes babysitting. Now prego with #2.. getting tired of lugging the exersaucer back and forth. Wanted to know if anyone has and what you think of it?

She has a 7 yr old, 5 yr old, 2 yr old .. and want to make sure its safe to put dd in with them around.

Thanks!