These are easy to install depending on which piece you get. Something with a lot of edges is harder and more areas to possible fail. Prepping the area and getting it clean is a must or the tape will not stick properly. I think less is more when it comes to accenting the interior but it depends on what color you pick. I added above glove box and the pillars with AC controls. I got mine to match exterior color Terra and Ive gotten many compliments asking about where to get them. Careful with corners and edges, that’s where you’re most likely to fail installing but keep in mind, it’s as simple as applying a sticker.