It's very affordable! We pay about $3/user/month, and for what it offers that's hard to beat, short of running your own XMPP server or something. It does offer pretty good cross-platform support, and the product support staff is well-intentioned. It's also oddly endearing. Our office lovingly uses the verb "Bro" to mean use Brosix. There are funny (quirky - check out "milk") themes too.

Lo que más me gusta es la amplia gama de características. Aunque no usamos cada una todos los días, todas resultan útiles en algún momento.