I just installed SoffSeal roof rail weatherstripping and it was a simple installation. I did read about some folks finding depressions in the seals. In the upper corners by the opera windows, the cavity inside the weatherstrip was sunken in a little. There are access holes in the weatherstripping in that corner. I took some old weatherstripping that I pulled out and shoved some into those cavities to fill the depressions. Made a big difference in that area. I had to adjust my passenger window quite a bit but it would blow out at highway speeds anyhow with the old weatherstripping. Took a while to get it right but so far, a dollar bill drags just about everywhere on the window. Now I need to drive the car and listen for wind noise.
Cleaning out the channels was not bad. I used little screwdrivers to scrape with and lacquer thinner to melt the old adhesive. The thinner did nothing to the black finish and since they are aluminum, the scratches inside will never rust. There was not that much old adhesive. The factory only put it in the upper corners of each window and at the ends of the channels with a few spots here and there. Spread it thin, it will skin over in a few minutes and then you can press the seal in to it. The seals fit the channels really well and I used a putty knife to press them in.
Other than being time consuming, it was kind of fun. Took me about 2 hours during the week to clean out the channels, about 30 minutes to reinstall the channel and weatherstrip per side. Then it took several hours to adjust the window because it was my first time. You can adjust the stops at the front and rear ends of the glass, the lean in and out overall, and the lean at the rear. And you can just remove the upper door panel only and do all this.