We are developing a product which we hope to introduce to the market soon. It has an Atmel microcontroller and some other circuitry. Recently we thought of directly using an Arduino BLE33 on the PCB without building the microcontroller on our PCB. This gives us the advantage of a easily swappable micro controller in case one fries. This costs a bit more. But other than that what will be the pros and cons of this approach. Thank you very much.