I find two things that are fantastic and slightly unexpected:
- for the large battery pack, the warranty does not have a limit on miles (8 years warranty for all packs)
- they have very reasonable prices for options, not trying to nickel and dime customers; for example, they charge $10k more for the performance version but they include about $5k of options in that

Of course the fact that there are no price hikes nor delays is also absolutely great, but expected for those familiar with the values of this company.

SOURCE:
http://www.teslamotors.com/blog/model-s-update-pricing-and-options