Well, I installed the Cliffy's I just received on my SF2. I really like the look, and it does cover the damage that was done by the previous owners and the regular play it got. I have not had the chance to play a game yet, as I am still waiting on a part to try and repair the machine from the last time I tried to fix it and started it on fire... o.0
It will be a good test for me, as the holes they are covering are crucial to the gameplay. I do personally see them as a "mod", but has function added to the look. I think Cliffy has some great products, and was awesome to deal with. Provided I don't have any gripes about the gameplay, I plan on buying more of them.
I am curious about the outlane protectors, and would like to hear more thoughts on them. Are they "one size fits all"? What do people think about the "look" of them? I think they would look great, but I get the point about the love for the natural wood look and feel too.