As I said above, Citadel is quite great to work with my co-workers. We don't really use e-mails between us anymore and we share heavy files with Citadel. Our exchanges are faster and my mailbox is less crowded. I enjoy this software and I would recommend.
Citadel Team is quite easy to use. It's like a 'whatsapp' but safer. It is really intuitive ! I only use it with my team to coordinate our work. We can easily share and store heavy files (that can't be shared by e-mail). I can preview files on my phone, which is quite convenient. I also really appreciate the fact that I can use Citadel on several phones AND on my computers at the same time. Synchronisation is very fast ! The web version is really great !
Citadel Team is really great but if I have to highlight something that I do not really appreciate, it would be the fact that sometimes it can take a bit time to synchronise with each device I'm working on. But I guess it depends of the wifi!
Likelihood to recommend: 8/10
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