For the money I would rate Avid as one of the best, if the note the best automation solution available. The amount of processing that we need to do has been cut in half since we have gone live with Avid and we are not looking back. I envision we can increase our payables by another 50% before we will need to increase staff.
We also like the method of submission for invoices. Avid uses Indexers rather than OCR which means you have a person looking at every invoice that is sent to the system.
Another great thing has been the reduction in paperwork. Because every invoice is captured in the system you never have to worry about losing an invoice again! I came into a completely paper based system and people are constantly surprised as the speed we are able to retrieve invoices.
And I can't end this without mentioning AvidPay. We currently write 500+ checks a month but will be able to reduce that to zero or very close to zero once we have fully automated payments. This will be another huge efficiency boost in our AP cycle.
One caveat is make sure you have fully demoed all modules and are very clear on what you are getting. The PO module is why I didn't give 5 stars and while I knew it wasn't as powerful as some others I was lead to believe it contained elements that it in fact, did not.
As I stated above, Avid uses Indexers rather than OCR and while you think the learning curve might be quicker for people vs a computer that is not necessarily true. The indexers do make mistakes and you need to pay close attention early in the implementation to make things are being coded correctly. You also need to submit tickets as things come up to help the indexers with the way you do things, or want them done. This be very helpful in the long run.
Test other systems and make sure they integrate seamlessly with your ERP/GL system. Demo all aspects and don't be afraid to ask questions about the products and what they offer.
Reduction in paperwork, payment processing times and missed invoices.