It doesn't suffer in schemes with high-cardinality dimensions because it manages more effective representation of multidimensional data.
MOLe server was created as part of budget planning solution, from what it was later separated and is further being developed as a standalone product. Originally it supported only a proprietary OLAP client and was hardwired to special relational database scheme for input. Currently it's got XMLA interface and accepts a subset of MDX queries, but it also supports lightweight web client communicating using AJAX with JSON protocol. On the back-end side it allows connecting to various relational databases with usual requirements on the database scheme.
For more information about MOLe please visit the dedicated web site http://mole.posam.eu