We describe some of the advanced features of the software tool SmArT, the Stochastic Model checking Analyzer for Reliability and Timing. Initially conceived as a software package for numerical solution and discrete-event simulation of stochastic models, SmArT now also provides powerful modelchecking capabilities, thanks to its extensive use of various forms of decision diagrams, which in turn also greatly increase the efficiency of its stochastic analysis algorithms. These aspects make it an excellent choice when tackling systems with extremely large state spaces.