I just had a quick look at the code and the code quality leaves a lot to be desired. If internal quality is an indicator for external quality there is indeed a lot of room for improvement left.
While Microsoft claims the new driver is fully JDBC 4.1 compliant key JDBC 4.1 methods throw SQLFeatureNotSupportedException and the code is littered with comments
// The driver currently does not implement JDDBC 4.1 APIs
While Microsoft claims the new driver is fully JDBC 4.1 compliant key JDBC 4.1 methods throw SQLFeatureNotSupportedException and the code is littered with comments
// The driver currently does not implement JDDBC 4.1 APIs