As others have said, it's pretty tight. Use lots of lube and just sit back and relax. The bullet vibe needs to be charged separately (or through the usb on the main unit), but it's quite powerful. The machine took me to the edge faster than I could get through the first 3 modes. It can be a bit loud, you aren't going to be able to use it with roommates or company without drawing some attention, but if you can get some alone time its worth it.