I have no problems with Jarvis. It has never crashed aka forced close. In the car, you have to speak loudly and make sure the radio is off.
I start Jarvis every morning and leave it running all day. Now I never have to 'type' a reply to an incoming text message.
I am using IVONA for the Speech. I am using Nicole, Australian English, as I think she is the easiest to understand.
Sorry you are having such difficulties with it. I am on a Droid 3 and use it daily.