Took the hassle out of driving ourselves just jump on the coach, make sure you have your passport and take a few euros or get some there for food/drinks etc. Border crossing can be slow but you can't do anything about that. The highlight was visiting Kotor and then traveling up the mountain to see the views. The driver was very good going up the mountain good pace but safe. The views across the Adriatic are stunning. We have some really good pictures. The guide also gave us some good information about Montenegro and Croatia including the troubled past from an unbiased view.