My car came with the first three oil changes free. They already did the first one free so thats not a bad thing. ALl weather mats could be purchased cheap anytime from more than one source. The Navi works well-- but some have said interfers with FM reception( I use XM and have no clue about that)

AS far as Bass system- the stock radio is decent but not great. The less the electrical system is messed with out of the factory the better.

Remember one last thing " Pigs get fat, hogs get slaughtered"