My two (CAGS) have got a playtop cage...
They make great use of the playtop. They're not clipped and are free to fly but mainly choose to be on the cage when we're in the living room (most of their out time is in the dining room).
I wouldn't bother with the skirts. Falling isn't an issue with mine not being clipped but to be honest they chuck their mess further than any seed catcher could reach!
I think they're more of a hindrance than a help.