Re: Has anyone with a Stokke Xplory been allowed to the plane door?
I don't see why having this particular brand, or having the bag to put it in, would make any difference.
Rules on prams vary depending on airline and airport, but generally you can take the buggy to the steps of the aircraft at the departure airport, then hand it to the cabin crew. On arrival, generally you can only pick it up at the baggage reclaim. This means that you might have a considerable walk on arrival. Check with your airline whether this is the case or whether they have different rules.
If the Pram Pack is too big for the hand luggage allowance (which seems likely) you will almost certainly not be able to take it into the cabin.
Regarding the Pram Pack, I simply don't see the benefit. If you give the airport handlers a buggy that looks like a buggy, they will treat it like a buggy. If you give them a buggy that looks like a normal bag, they will treat it like a normal bag.