I bought two one for my wife’s ebike level step through and one for my level ebike. They were easy to install I downloaded the instructions. Hardest part is my big hands getting down into the bottom of the tube. What a big difference in riding my wife and I both enjoy the throttle on demand. It makes for a much safer bike, taking off from stoplights is now a breeze. I also upgraded my stem on my handlebars are now elevated and moved closer to me and I’m having a lot less stress on my shoulders since I sit up straighter. I also put on a touring seat which feels great on my butt since I just had a spinal fusion done and I took the preload off of the front forks so it makes it a sponge your ride but very comfortable. I feel like I have a new bike I had 700 miles on it before I did these modifications.