You may want to actually ask Lawson to provide you with ‘justification’ for this training as well. It seems that it would be in their self-interest to verbalize why you should take their training. I took Level 3 several years ago and found it beneficial. I’m sure the content has changed and I could probably even learn a thing or two from the class now.
I would say understanding the Cloverleaf architecture was the biggest thing I came out of it with. For justification purposes, if you do not currently have anyone on your integration team that is level 3 certified I would say that you should have at least one person that has an in depth knowledge of Cloverleaf that is able to tell if a proposed interface design is the best way to approach the given problem or not. I started with Cloverleaf on my own with no help right out of my Level I class 10 years ago and learned by trial and error which I would not recommend. You can design yourself into a corner where it becomes impractical to change the design once it’s in production. You and your future co-workers are then stuck agonizing over the way you developed the interfaces. (guilty as charged) In short, I think you need at least one resident expert at your facility.