I like the simple UI, although took some time to learn, but it was easy to use, and the best part is you can add or delete user in one click, no headache and whole team is infront of your eyes.
How easy and intuitive it is for people that are not yet used to professional tools for communication. The fact that zenzap uses terminology that is readily understood by everyone, even my 70 year old boss, makes things extremely easy. It helps our team, which spans over 8-hour time zone, and different digital backgrounds, have all the work communications in one place and easily available asynchronously. I also love that the basic plan for a small team like ours is totally free.