There is the power in the robust and modern system
Value for Money
M3 is on the market since many long years. It is well developed product with great potential for the future. Too big system for small business, but very good choice for medium to big size of business. Good in manufacturing.
Very good MRP. Clearly shows what is the source of the demand: a sales order, forecast, work order. Tells to user clear communicates and help to manage exceptions.
M3 is ready to apply to the system the logic of your system. More time you spend to define perfectly rules, parameters, routines then system will support you better and you need only to manage exceptions.
If you have good experience with MES systems, probably you would expect more from M3. It gives good basics but does not provide full MES functionality.