I have only used them once, about 4/5 months ago.
Took about 5 weeks to get one big box from them to me in Western Australia.
Given l'm still waiting for a birthday and anniversary card from my wife in Singapore, l'd says that's pretty quick.
No complaints from this end.
Hope the seat works out, mine is getting less comfy each time l ride. Only cure l found is to ride harder, faster and standing up.