I've used one, and it's great, but it's much too much money for the advantages it gives. My second-hand HK LUCAS 600 system gives better projection, and is just as flexible in terms of transportability, adding extra power etc. HK are German, and hugely over-engineered. The Bose is a Rolls Royce, but the HK is more like a Volkswagen.
IMHO, of course.
Tim