Yes, this is a very fine work.  I have heard some radio-perfomances, and
they have been good.  It is a very "french" sympony.  Olsson was influenced
by Cesar Franck and the other french organ masters.  You will get more
information on http://home3.swipnet.se/~w-38951/otto1.htm

The inormation is on Swedish, but there are some interesting links.

Best regards!/  Lars-Johan Lonn