Like most, I was pretty excited to see Novell getting into this space in an open source fashion. I finally got some time today and played around with it a bit. Previously, I couldn't even get it to compile on non-2.6 systems and then I could get it to compile but it would segfault immediately. Now the latest stuff in svn finally seems to be working.
So, first off, it's pretty, but it's not really usefully pretty. IMO there's far too much graphics. This is a web app, and the web is slow. Most people use dialup. No, really, they do. Even now.
I also don't really like the fact that creating a calendar event is like writing an email, with a "to", "cc", etc. Sure, maybe you want to invite people if it's a meeting, but not always (eg. doctor's appointment). I don't know what to put there. My email? My name? My username?
Also the "new event" page feels like filling out a form. I don't like forms, and I especially don't like web forms. Give me a better way to do this, by clicking on a time in the day view or something. Oh, yeah, why does the day view have no times? Most calendar apps show you the hours of the day in day view, not just a summary of your events. That's a much more useful visual representation, IMO.
Now I don't mean to be overly critical. I realise this project just got started and of course I really hope it turns into something great; a solid web mail/calendar/contacts app is sorely missing from the open source stack, but some of the initial design decisions are a bit worrying, in that it seems at risk of becoming "yet another Horde."