Yes we have used it. recommended settings are
MaxServers The lower of 10 * number of disks or 10 times the number of processors in the machine.
MinServers MaxServers /2.
You could start with these values and by monitoring AIO usage, tweak those settings. You also have to properly configure numioservers, pagecleaners, and sync up your extent size, maxpgahead etc. Also use blocks in your bufferpools and proper filecache %.
I have used this in a large oracle environment(35 db's) p570/64gb real, shark,san tech and have seen the wait on I/O drop tremendously. Is this what you have observed on your DB2 server ? If not, what did you measure before and after to gauge improvement ?