note that this train has NO seats all the way, only sleepers.
On border, middle of night you have to get OUT and pay for that Turkey visum-sticker. This will not be told to you.
Even though they say it comes from Beograd it does NOT-this is just 1 car, and when that comes in very late-happens fairly often, then you miss the shunting to the train and have to wait-till next day.
ARR in IST will be al least 2hrs late. From next year the new tunnel under Bosfor for trains will open and the old station in IST will change too.
There are also quite a lot of reports of sleeper-car conductors swindling you to pay for a new REServation, as they conceal your slip and show you one held over from last nigth and then tell you you are on wrong day and now have big problem. Hopefully these crooks-even with all the backing of trade-unions, are now sacked.