Lisa,
There were 2 parts to your question
1. Slowness - Time it takes to navigate charts is one of the known issues. However, we are monitoring the data and analyzing it to see if there is anything we can do to improve the performance. It takes time to get it right, just like it took time get it right with Centricity 10
2. Known Issues - Centricity Engineers are aware of those issues. We will have to wait for them to resolve those issues and send out the updates to all clinics and hospitals using Centricity.