In the Phone app, T9 dialing doesn’t work – this is the feature that automatically looks up contacts as you’re dialing their number or spelling their name. Additionally, pictures in the Contacts app are low-resolution, and third-party fixes like HaxSync don’t seem to work yet.
However, if this doesn’t deter you, and you are looking to get at least a little taste of stock Android on your Sense device, just copy those apks into your system/apps folder, change their permissions to match the rest of the apps in that folder, and you should be set.
[xda-developers]