My ongoing gripe remains on populating the Dashboard. Sometimes it works and sometimes it goes to the never-ending spinning thing. I generally have ~6 reservations at any given time and rely on that dashboard to refresh my memory on the details as I often move things around.
I'm logging in using a carefully maintained MacBook Pro with Safari. I routinely monitor for malware (etc) and keep up with patches.
And yet, the Dashboard remains, for me, a persistent struggle. Somedays it works quickly ... other days it is either "slow" or "doomed to fail." I got two of those three even today: quick! and "doomed to fail."