Cisco Duo

The UI is very intuative and the documentation is very well and comprehensively written

As a user, it was easy to install and to use. Our IT department sent a detailed instruction, not sure if it was provided by Duo or they created their own, but that was also easy to follow and helpful. Other MFAs I have use send verification emails/texts, but I much prefer Duo’s way.

The mentioned end-user experience could be somewhat enhanced. Some of our clients do not have formal means of training their own employees so very specific things like: "employees using personal cell phones", and replacement of those devices, quickly become business issues that creates challenges for our smaller clients who do not have formal guidelines along these things are more informal in the way their business runs.
All things that can be helped by us as resellers but some existing client-facing documentation would help and more administrative controls to help "force" people in the right direction.

Like all Cisco products, it can be a little difficult to configure and use properly. Once set up, it works like a charm, and we rarely have to reconfigure it or update it. We do wish it integrated better with our SonicWALL firewalls.

The ability to update the authentication proxy is very easy.

I did require a little help form the Support team for initial setup and system overview, but mostly it is straightforward. Policies do require a little understanding on how they work and when to use, but there is plenty of documentation and support staff available to assist with any requirements you may have. I have not come across any issue that was not resolved quickly.