I know I will get slated as it doesn't add any power, but I like it. I have an AEM short ram. Replaced the pop charger which came with car so didn't notice any difference in power (maybe a little more responsive though). Quality is superb, and easy to fit with good instructions. Only mods I have are stainless cat back (custom made so no particular make), H-DEV plenum spacer. Plan (when the current cats get a fault), is to replace with HFC's and get an uprev remap. As you can probably tell I don't like spending money without reason, but I have to say I am pretty chuffed I spent the extra on an aem kit.
If it's power you want (please anyone, correct me if I'm wrong), it's a panel filter you want