I'm also glad that we entered Schengen by land, I don't know if you know what it meant until now to cross the border from Romania into Hungary (hours in line, often the drivers' nerves were breaking down and some of them were even arguing among themselves).
And to come back to Sighisoara, I recommend you to visit this city again because it is really worth it, plus you can plan to visit some areas near Sighisoara, it really is a spectacular part of Romania.