I was already running Norton Internet Security, and since installing Norton 360 Beta I have noticed no running difference at all. It all seems very well integrated.
I have found only one problem, but as you instructed I will leave this comment until it is asked for.
No change at all, infact I am quite pleased that unlike some previous Norton products there has been a complete slow down of the computer, no slow down at all and it also works quietly in the back ground when there is a period of not using the computer whilst switched on, with the little flag that pops up makes you realise that somethings going on and deters you from switching off and I dont mean that as a bad thing because one can forget to do things on a regular basis especially when all is well. A Full scan does not take as long as Microsoft Security Essentials which was on this computer previous.
It is running in the background without incident doing its job of protecting my system. Almost with I had more to report but like the last few Norton products I have beta tested it is a case of download, install and forget it is there.
No noticeable problems. However there are still quite a few glitches on Windows 8, although these are disappearing fast, so maybe it is difficult to be sure if these are due to Norton or not . On the whole Norton does seem to be running OK. I have an old Celeron processor running this test set up but I am pleasantly surprised by the lightness of touch re its performance on Norton
I have been playing around with it for a few days now and everything appears to be working fine. Initially I thought that Firefox was running a little slower but as I have just upgraded to Version 9 and then 9.01 it is difficult to point fingers. I have had it run all the tests and clearing up etc and low and behold I find it also clears out the Microsoft Messenger files which store the little Avatar pictures of people. I thought this was just a Ccleaner problem but it seems the same happens with Symantec. Perhaps they have to speak with Microsoft about this and possibly get Microsoft to move these files to an area which isn't subject to cleanups. I know you get the pictures back as soon as someone comes back on line again but it shouldn't happen.
Apart from that I can't say that I have noticed anything untoward. One thing I haven't found is a Defragger which I always thought was part of these Symantec Packages but perhaps it is no longer. It was one thing I used to use a lot when I had Norton previously.
System load has generally been very low, and has had little performance impact on my machine.
The only thing I have noticed is that since installing it, downloading emails from my POP3 server seems to have slowed down considerably. I have disabled the anti-spam module, with no change. I will do some investigating to see if it is Norton, or just a coincidence. My email client is Thunderbird.