What do you like best?
The journey has been a big learning experience for both parties. I've rated our experience with the vendor as high, not because the whole project was plain sailing and everything went perfectly, but rather because when critical issues arose and were escalated we received good attention from the vendor in drawing the right resources together to facilitate solutions. Ultimately, that's what you want. No project, especially IOT ones, is going to go 100% to plan, and what you hope for is a responsive vendor who "owns" the issues and figures out a way forward.
What do you dislike?
Ensure that the vendor has strong ownership over as much of the device elements of the solution as you can. SAP is traditionally a software company, but IOT solutions inherently encompass hardware. Also ensure that the testing of devices and data is more systematically owned and managed by the vendor to ensure that this is in good order before you formally go live with your solutions because issues with data integrity completely undermine your best efforts at solution adoption.
What problems are you solving with the product? What benefits have you realized?
IOT related