I have an F90bt. What are the differences between 2.0 and 3.0 on the device. I mean, is it worth it to update the unit to 3.0. Does this also include updated maps? Sorry if these are basic questions, i am not too familiar with it.

yes if you but it from pioneer, it comes with the maps.

if fixes a lot of the bugs with the system and makes is quicker

as for exact differences, they have been discussed more than a few times, search around a bit and see