Maybe even more than in other parts of the Netherlands, people know to speak their foreign languages. So don't worry if you don't speak Dutch, many Maastricans are happy to speak with you in English, in German or even in French.
The town is a good mix between students (mostly medical and business) and locals, who keep the town alive and fresh.
There is a train from Liege.
Maastricht is great for a night out (Maastricht is home to both a University & Institute). therefore, lots of students, also lots of foreign companies are based here so a mixture of international pubs & clubs can be found here.
Maastricht is known for its yearly "Carnival," a tradition celebrated in many towns in the south of the Netherlands.