These results provide strong evidence that multivariate normal probabilities can be robustly and reliably computed at low to moderate accuracy levels in less than a second of workstation time for problems with up to ten dimensions. When at least moderate accuracy is required, the implementations SADNRM and KRONRM are usually much faster than the other methods. High accuracy or high dimension problems can require long computation times for these methods and it is still not clear what is the best method for this type of problem. Software for all of the methods discussed here is available from the author.