What does the company do well? Acumatica offers a solid ERP platform that can be customized to a businesses needs. The system is well organized and is overall pretty easy to use. Out of the box it has good functionality that covers all of the bases you would need to operate a small to medium business. If you have complicated systems it'll need to be customized so make sure you're working with a good partner (we use ISM). But if you have complicated processes any ERP will have to be customized.
What does the company not do well? When performing large transactions, the system can be a bit slow. Our dev team says this has to do with how some of the system code it written, I'm told there will be improvements when we upgrade.
What about the company do you wish you had known before purchasing? Though the system has a lot of features out of the box, we have some pretty special processes that have required a lot of customization. As I think is typical for ERPs we were oversold a bit on the basic capabilities. Our implementer (ISM) has been good to help us sort through things and has connected us directly to Acumatica support when needed.