Simple Delivery is everything but simple. Got to post something just over 2kg, it never asked me the weight of the parcel, it's not clear whether it will charge for the additional weight. Their FAQ says Post Offices have been instructed to accept the parcels, and that the sellers won't be charged more if they used the recommended package size. I have no idea whether I did or did not use the recommended package size.

Called Ebay support up, pretty useless:

 - option 1: cancel the order, re-list ... blah blah I have no appetite doing this, next option please

 - option 2: don't use the label, use your own courier, request a refund ... how is that simple?
 - option 3: the label is fine as long the post office accepts it, but when I question the weight limit I get no answer other than the post office will check the weight against the label when posting the package; but what if I use a parcel locker? 

I hate it. It's terrible customer service. The system doesn't work because it provides no flexibility and the information provided is not adequate. Maybe I can use the label without risking additional charges to me or to the buyer, but I don't know. Do I want to risk it? No, I do not. Do I want to cause the buyer additional hassle by cancelling and re-listing? No, I do not, and certainly do not want to do that on a regular basis. Would I like an integrated postage service, yes but it needs to work every time for every item and needs to provide the flexibility.

Hey, the poor sod at Ebay Corporate that's been given the job to read these comments, wake up an escalate, re-escalate, and escalate again until someone does something about this situation.