The set is fantastic, my son loves it. Problem with this is mainly the instruction manual, not the product. The bolts and washer letter designation do not match the blister packs. The only way around it I found was to take the part and match it to the instruction book. Fortunately the manual pictures are actual size of the bolts, etc, so you can match it up that way. I can see someone who is not mechanically incline get frustrated with the installation. Lifetime should update either the manuals or get the labeling correct.