Sqlite on Android - is it stable to use and does it work fast?

I'm asking for a piece of advice. Currently, we are developing android client for out service. Service produces like a lot of dynamic information, and it must be stored on users phone so it can be accessed without connection to the net. On iOS client we achieved this using restKit. On android I found that there is no tool like restKit. So there are 2 options - use sqlite db or cache last json response. I want to use sqlite db, but out android developer sad that it's not stable and slow. Is he right? What practice is better?