Yes, I mostly hibernate. I do shutdown from time to time when I 'feel' like it needs it, which is about once every two weeks. My desktop hibernates constantly, with a reboot only when necessary, or when applications demand it. I've not experienced any issues with this method.
I am running Win7 Pro 32. EIS is at 126.96.36.19915. I could not find an 'About' anywhere in the GUI, so I found the version number from the executables.
I like that the software is diligent about being up-to-date, but I think it would be nice if it could delay until the system was fully booted and/or not be a resource hog. I might be able to mess with the load order using the app from Sysinternals, but that would open a vulnerability; it needs to be first in, last out. Since it keeps itself up-to-date anyway, I don't feel that there is such an urgency to be current, that I have to have a poor experience. It's like a traffic jam where everyone wants to get through, but no one yields, and then it all just takes so much longer.