Many people have said that Flight of the Nighthawks is classic Feist, but I have to disagree with them.
Flight of the Nighthawks is a nice and readable fantasy book and it features some familiar characters, but it's just not as good as Magician or Silverthorn, which is one of the best Midkemia books I've read.
If you like Feist's books, you'll probably enjoy reading this book.