Good entertainment for kids, especially for kids 4 and up, even my 11-16 yr old nephews had fun with it.. My 2 yr old daughter likes it but goes a little too fast for her, so she's more comfortable with someone assisting her down on it so it goes slower.. I think a good optional feature that should be added to the car would be a seatbelt, it would make the car much safer for the younger kids.. One other thing I noticed while assembling the track is that there isn't any holes drilled in to insert the bolts it comes with to hold everything together, granted the track is pretty durable without the bolts, there should already but holes drilled for bolts, especially since bolts come with it, to assure that extra durability and safety.. Other then those two little things the extreme roller coaster is a wonderful product, kids really enjoy it and have a blast, and it is a pretty durable and safe product overall..