Anyone using a CleanSweep (cl441dsp)? I have leaning towrds installing one in my 09 - I was able to pick a used one up for a c-note. I'm just wondering who is using one and they make a noticable difference. Also, are they a pain in the **** to install? I know they have the CD that will automatically tweak the settings and such. I just need to get off my lazy butt and finish my install.