I'd argue the Control Techniques Software is good, but the way the Firmware makes you jump through hoops to 'connect the dots' can be a pain.
If it's a single index you're looking for, it's really not that tough. The AMC can be set up strictly with Unidrive M Connect so that a digital input can initiate the Index, and even switch modes for Jog, etc. without using an outside (or the internal) PLC.
If it's small enough, use a CT Epsilon EP Indexer. Power Tools Pro is good software...