TENS machine?

Jade • First baby due March 16th 2016. 💞👶🏼😍 boy. 💙👶🏻🙂
Hi ladies getting closer to my due date now so im starting to think more about my birth plan etc! Just wondering if any ladies used a TENS machine for pain relief in early labour and if so, what was it like? Good investment or waste of time? Thank you. 🙂xx