I just upgraded from 3 to 4a, and the interface changes are phenomenal. Really, it's just amazing. I love the layout and the workflow, both of which are radically different. One of the things that made Logos 3 almost unusable for me was the difficulty in finding what I wanted amidst a large pile of slow-to-find resources. However, Logos4 is also very slow. In particular, the CPU spikes whenever I go from the home screen to another screen (like clicking on the links from the home page) or when searching, etc.
I have a Dell Inspiron Laptop with about 47GB free on the harddrive, 3GB RAM, and an Intel Core2 Duo T5750 CPU (2.00 GHz, dual core). I am running Windows 7 Professional 64bit. I know you guys are continuously working to improve the product and complete the feature-set for Logos4, but I would just like to cast my vote for better performance.
Thanks - and thanks to Dave Kaplan for helping my wife upgrade my Logos for Christmas 