I preordered the Hellion X20 for my four year old a few months ago. The process was smooth and Adam was always quick to answer any questions we had. Stepping up the 20" bike was big step up for my son, but he adapted quickly. The bike was easy to setup and the quality and build spec are excellent. The brakes and drivetrain are great, but the suspension is what's impressive here. I worried it would have that pogostick feel a lot of lower end suspension has, but that has not been the case. The suspension was easy to tune is very plush for my 50 pounder. It really works! My son is already riding riding steeper trails, hitting bigger jumps and drops, and attacking more chundery sections with confidence. This bike inspires confidence! I'm excited to see where it takes my boy a year from now. Most importantly, my son loves this bike. Sometimes it's hard to get him to come inside because he loves riding it so much. If you get your child this bike, I recommend a full face helmet because they are going to be sending!