I didn't find it stressful at all, but I'm quite familiar with taking car interiors apart. I bought a roll of vinyl for about $20 and still have half of it left. I cut the pieces slightly larger than I though I needed, peeled tha backing off, heated with the heat gun and applied, heating and stretching as needed. The only PITA area was the front corners of the arm rests. For areas where there's a cutout, like the cup holders or where the switches go in the arm rests, after the vinyl was on the piece I heated up the area of vinyl that was getting cut out, then pushed it inward so that the film would sort of wrap around the corners, then used the knife to cut it out. For the gear shift bezel, I wrapped the whole piece, used the squeegee edge to trace around the edges of the chrome trim and gear indicators, then carefully cut along those lines. I really didn't have any issues with trapped air bubbles as the vivid vinyl is designed to not trap air.
To see everything I wrapped, check out my showcase:
2014 Jeep Patriot (Slate Grey)
www.jeeppatriot.com