I like the pricing model that is based on active users rather than named users. That aligns well with the value being delivered. We love the mobile apps and how it eases the chore of creating expense reports when they are due. Adding a personal/corporate card for automatic importing works great. Integration with Quickbooks works really well now that they have automatic/recurring sync. Reimbursement by ACH is free and reasonably quick. Integration with Google Apps for delegated authentication and account creation/domain sync is very helpful. And finally, the ability to use defined formats for report names is really helpful to keep things consistent.
There's very little that I dislike but Expensify is falling behind in integration with other platforms via an API, webhooks, and Integration-as-a-Service providers Zapier (just realized they had it, not sure when it went live). There's also a fairly niche requirement we have for a summarized invoice line item by customer in Quickbooks Online that we aren't able to do but that's a pretty small issue in the big scheme of things.
Great company. Easier to do business with than some larger players. Support is fantastic and lightening fast.
Enterprise Expense Management. Reduction in time and effort required to manage expenses for a dispersed organization.