Hi,
As a end user I would say yes. The more complex and/or large the projects are the louder I will say yes, it is absolutely worth it. Our machines can have over 1000 sensors, 6 or 7 J-Boxes with remote I/O, multiple vision inspection areas, not to mention a few hundred feet of wire way. Don’t forget all of the multi-pin connectors and multi-conductor cables and of course a pile of terminal blocks all connected to a free standing enclosure with at least one PLC, servo drives, power supplies ….
When a schematic and panel layout is ‘complete’, it can take several of us a couple of days to check wiring to/from call outs, component location call outs, I/O tables, Bill Of Material line items, etc. The report packages bundled with ACE 2008 can do the same checking anytime you click on the little button.
On the other hand, if your project only requires a few sheets (B size) and have one or two panel layouts your probably OK with what you have. You don’t need a sledgehammer to crack a walnut but you are not going to drive a railroad spike with a nutcracker.
Good luck