Is Jumperroo useful for our babies? I heard its fun. When can we start using it for our LOs?

I let my firstborn try jumperoo, exersaucer etc. I remember he was having a ball of his time with those. He started at about 5 months when he was able to support his neck properly. He was crawling at about 8 months? And started walking at 16 months. My second, no jumperoo or exersaucer, didn't think it's needed and he progressed faster. Started walking at 11 months. Perhaps learning from his brother too? Anyway, have a look at pre love jumperoos, they cost much lesser and your kids still can have fun!