I went to Sandhurst as my MIAD back in 2006 right before Cow year..  It was honestly one of the best training events I have ever done.  It was good, tough, realistic training. We flew into England were integrated into a company and then deployed to Canada for 2ish weeks of platoon and company operations.  I enjoyed the experience very much, and still keep in touch with the guys I went through with.

Do it.