I bought this in a deal when i bought my laptop. i was cautious towards Norton because i had Norton 2005 before this, which was extremely slow and sluggish.
The installation speed was extremely slow, but much to my delight, installed properly first time, which is always nice!
Since then, in 14 months, i have never had one problem with my laptop, whether that was also down to the laptop being a Toshiba or not thats irrelevant. I can safely surf the web, buying my shopping online, which has even converted my parents to it!
The alert system is good, it alerts you when it finds a tracking cookie, and usually minimizes all programs just to make sure (which can be annoying!) Its scans are very simple to use, you can customize them really easily to suit you. i would give caution to people with just one processor, the scans are quite demanding on computing power! (doesn't bother me, i have a dual core!!) I have found the backup feature utterly pointless, they give you 2GB, and you have to update the backup every week, which you have to set up manually.
On to the best bits, it is very thorough! The scans clean up everything, from temperary files, to files you don't want, and the best part of the program, Disk Fragmentation. This makes your system run at optimal levels all the time, and this actually works! (I know MSFT has one but its crap!!!
Overall, its a very well developed piece of software, which caters for almost everything one could possibly need. Can't give it 5* because of the few little 'problems'. other than that, well worth the money