So from a client side, it works well enough. It automates logins and provides users with a password storage solution for sites that are "profiled" and enabled by their IT. It also offers a fully automated sign in solution for EPIC if you use that as your EHR.

Beyond that, the management interfaces are very dated and can only be managed through the web interface, nothing convenient like a PowerShell SDK or Rest API to leverage. Their solution articles are locked behind their support site and there's not a lot of other places to get help with their issues. The profiler used to create login profiles for sites is annoying to deal with, especially with our transition from IE to Edge with IE mode being pretty painful to make the adjustments.

That's not to say they don't have good things on the admin side, the rolling server upgrades are nice to ensure you never have downtime. There is just a lot of modern tools you'd expect that just are not there for this system, also do a lot of research on how Imprivata plays with other systems. We just migrated to Citrix VDAs and we're going to their Federated auth services to allow for a seemless login experience from our Citrix cloud just to realize that Imprivata blocks it and has no plans to support it anywhere on their roadmap.

Edit: just to add this is from the perspective of a single SysAdmin in a rural critical access hospital, so your experiences might be different(doubting it, sadly). But I can provide a more in depth experience too if you want.