[maztaim]

I had a not great experience with Notes. It was slow and cumbersome. I had become used to Outlook for e-mail, plain simple e-mail. It was fast, light and didn't treat everything as a note. Notes is this heavy app that was slow to load anything with an early 90's aesthetic.

I worked for a large financial (~80,000 employees) that decided to move to Notes from in-house exchange servers well after it was obvious Microsoft had won the productivity wars. Rumor mill suggested it was brought in at the direction of a board member who just so happened to have close interests with IBM.

It set overall productivity back by at least 5 years before executives were forced to make a very decisive and quick move to O365. The reason given were scalability issues, the overwhelming cost of purchasing P-Series hardware (6-digits for one server) by the rack to keep up with demand along with the cost of developers attempting to make something useful for all of the different business needs.

Last I checked they are still stuck with some small, but essential work being diverted through Notes despite the move back to Microsoft.