When we bought our coach new (2005), the MagnaShade was unknown. At that time we were still doing a lot of camping with our boat where we parked for a week or two in the same spot in HOT weather. Back then we ordered the MCD shades with the coach. They snapped on and then used Velcro triangles at the bottom that allowed you to stretch the screen and make it look nice.
Something that hasn't been mentioned is that the MCD shades came with four window screens. Driver's window, windshield, front door and passenger window. It required a ladder to put them on, but I used my awning rod to gently pop them off. Since we were typically staying a week or two, they really were not a hassle and looked great (black) against our tan and green coach. They did take some work to clean, roll up so they fit in a tube and put away.
When we quit boating and starting doing more stop and go travelling (just a few days at a time in places) we found that putting up the MCD shades was a hassle. I then purchased an indoor shade that used high quality suction cups and was cut to fit. It was tan, looked nice and worked well. It didn't block the heat as well as the exterior shade, but was easy to use.
Soooo.... I think what you buy depends on how you will use it. If you're going to winter in Arizona or another hot spot, I would get a set of shades for all the front windows. An occasional need, I would get the inside shade, more frequent use, an outside shade.