We've been an enterprise customer for quite some time, but their products just did not improve, while the competition did.
When we negotiated on extending our contract a key factor was that for their handoff feature every developer needs a paid seat. With Abstract these seats are free of charge.
When struggling with a tool, these thousands of dollars per year really made the difference.
We've switched to Abstract (for file handling/versioning, prototyping and developer handoff ) and are super happy about this decision.
Good bye, Clark from Invision.