I guess you are working constantly to make SL as good as possible. I think there is too many problems with lag. Often it not possible to move or chat.
Often it is necessary to log off and on again. And often it simply appear dead and you have to restart you computer. When it runs the program is using more than 70% of the CPU.
When do you expect it to perform better?
Best regards,
Vecciano Rasmuson