The email integration with other mail clients has been great so far, though I've not used it much since switching to zarafas own webmail client (rather than using something like RoundCube). It's pretty easy for new users as you can log in via your browser instead of needing any special apps installed. And it's very flexible which makes creating custom functions/tools easier if you need them or want to try out different ones. Haven't found anything that really annoys me yet either, but then again this isn't my day job :P So far it seems fairly stable, works fine on Linux desktops and laptops too! Works well for SME businesses with less than 50 employees, have no complaints about that at all! Integration into our CRM system was also quick and painless, which made life quite simple.
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