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.
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.
As a first time user of ANY Norton product, I have not had any problems, so far, although yesterday, while on PCA, the refresh rate of pages was extremely slow. On my other computer at the same time, the PCA site was OK.This problem went away after a shutdown and restart.
Also during install I was asked to remove Zonealarm and System Mechanic - which I did do.(using another uninstaller, REVO).
I reinstalled System Mechanic today and so far, everything is working ok.
There is no obvious performance differences between 360 and NIS 2011 that I used previously. That is a good thing and I am very pleased that nothing much has changed. I do however have a couple of issues after using it for a few days:
1) I tried to install Serif WebPlus 3 starter edition from the PCA cover disk Jan 2012. Norton flagged a file pb7de1.exe as behaving suspiciously and removed the program without prompting from me. I tried again on a machine running NIS 2011 and it did the same. What I do not know if this is an issue with Norton, PCA cover disk or Serif.
2) I now have a small Norton gadget in the top right hand corner. When hovering over that it brings up another small box to close the gadget or drag it. The latter is greyed out and I cannot find a way to activate it - not that I want to.