The link controller has been amazing. The Bourke tooth connection is strong and the app controls are very very smooth. There is a downside with the unit as in make sure you have the power on both functions turned off before connecting the machine. Don't think that you have it powered down. Make sure you have it powered down. This would have been a 4 star review, but Motorbunny was absolutely perfect with their customer service. I reached out to buy a new controller but they sent me a replacement with verification of ownership. That pushed it back to 5 star. I would buy it again.