Do you have any specific questions? The reviews from previous years do a pretty good job at talking about BU/BMC (and Tufts for that matter). The Chair and PD are well regarded, and it's particularly strong in addictions (although its C/L and community are great as well). Inpatient is scattered across a couple of hospital sites, and there's no unit at the main academic hospital.
(Not a resident there, but have a passing familiarity with the program)