If you will usually be camping where you have electrical hookups and you use your microwave often at home, then it might make sense to get one. In our case, we often dry camp and don't have power to run a microwave. We ordered our AF without the microwave. We had them put a cabinet in place of the microwave. It gives us enough space to store a full set of pots and pans.
We did not get the built in generator, but we did have a solar panel installed. We spent 3.5 months traveling and never felt like we needed to use a generator, although we do have a Honda eu2000 we can take along if we ever needed to. Note that we do not have an air conditioner either so the only things we need electricity for are the lights, charging our electronics, and the furnace fan (if it is running). Our solar and the charging we get when traveling is typically enough to handle our needs.