I’m 20 minutes into ep 16 and, so far, nothing devastating. Lots of tears throughout in the later eps but I think the final ep (17) will be the tissue-killer. Hang in there 'cause it is so worth it! (Just to see Junho if nothing else!)
Addendum: I highly recommend anyone who is currently watching TRS to carry on and finish. You won’t regret it. The last episode, while sad, has a very BEAUTIFUL ending showing how much the king loved his court lady and vice versa. Also, how much he was respected as a king by his constituents. I’ve watched a lot of Korean history dramas and I’ve NEVER seen one of the king’s subordinates (ministers) tell him that it had been an honor to serve with him (the king). He must have truly been one of the greatest kings of that era.