I installed our Progressive myself. I followed the directions, no problem. Before we sold the TT I took it out (if you can put it in, you can take it out). When we bought our new TT the dealer had it reinstalled in our new one as part of the deal. The new location was much harder to get to so I let their guy do it. Sooooo....The install is easy.....the access may be the hard part.
Also, I much prefer the installed version over the old portable ones I had before we bought the progressive.