I've been having issues recently with my pc performance while playing WoW, which curiously enough seemed to really escalate the moment I hit 90 on my hunter. I really need to unload all the bloated data such as pictures, music, etc off onto a larger storage drive, as my miserly 500 gb hard drive only has 23gb free, which I'm sure has lots to do with it.
Anyways, this machine when I first bought it sometime during WotLK, was beautiful, giving my 60 fps in what was previouslly known to me as Lagaran, but as the machine filled up and time marched on, performance dimished.
Cue forward to being level 90 and logging the game while inside the Shrine of Two Moons, and my fps would drop from a playable 15 or so fps to 1 fps. Agonizing to say the least. If for some reason I had to tab out to view a web page, well that was even worse.
I stumbled across some info on the Razer Game Booster, figured I'd give it a try, and having installed this now for a few months, it works as advertised. While my fps isn't up to the 60 fps glory days, it's usually more than acceptable. As I'm writing this, I just logged into Orgrimmar and am at 31 fps. 30 fps in Shrine of Two Moons with no lag. I did some LFR the other week with no issues (well my mouse battery died, that was exciting), which would have been impossible prior to using this software.
To summarize; it's a great piece of software and I am very happy with it.
Edited, Jan 13th 2013 2:58pm by Xizervexius