The vibration speeds and patterns are amazing! Definitely kept me on the edge while at a busy pub. Might not want to use somewhere like the cinema or a library. It didn't come with any instructions and so was a little tricky to get up and running to start with. The ask a question feature helped and turned out the provided remote battery was just flat, I had some MN21's already though. Also only by keeping an eye on it and setting a timer did I learn that it will remain turned on, without use for 10 minutes before automatically turning off. Otherwise a great little product.