yes i've used it and it's small and easy to use.
you can reduce your code at half or less with it.
for the different servos, there is no problem since you send directly the degrees to the servo.
for example: servo.write(45);
don't send more degrees than servo can support and that's all.
i have some code using the library on this thread: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1209207563/4#4
check setup and loop, the other functions are for analogic purposes