no they are broken since google modified the frame work to support group MMS natively in the google messanging app. there is also native emoji support. why you would use handcnet or chomp is beyond me they have the ugliest UI ever. the group mms add is the best feature of 4.2 imo
i absolutely LOVE the UI of the stock app. I used to use handcent before 4.2 because the only way I could group text was to use it since google dropped the ball by omitting the feature for so long.