Has anyone succeeded in getting a free trial of a module in your sandbox environment? Specifically, we are looking at NetSuite WMS.

Not personally. I'm fairly certain that the way licensing is done there really isn't a way for them to provision it in one of your accounts (sandbox) and not the other(s) (production). I HAVE however, been granted access to demo accounts and developer accounts with specific modules provisioned. So more for like "playing with how it works generally" rather than "will this work with my existing configuration?". Although even that was like pulling teeth to get it. Guess it just depends how likely they think you are the actually buy and how close they are to quarter end revenue reporting. 😆

I've been able to get a client a trial to SuiteAnalytics Connect before I implemented it for them.