We'll, at least it's still there and in use for a musical purpose : )
I too was fortunate enough to visit the building with friends (In fact Susan left us alone in there for some hours, because she had to go). The main studio has still breathes atmosphere of the 50's and 60's. But i don't think it's commercially viable in this day and age, not for jingles anyway.
See a picture tour of the building over here http://www.jingleweb.nl/index.php/paginas/pams/