So, we bought this for my first son when he was 18 months old -- we didn't buy this exact one, we bought the regular Green/Yellow one that was available, but they're all pretty much the same.
We didn't think much of it, just something fun to have in the yard for a boy who has never been interested in t.v. and always wants to be outside. Not much power, but enough for a 18 month old. At first, we were unhappy that it couldn't make it up our slight incline of a front yard. The traction of the hard wheels make for slippery driving when the grass was wet. My husband screwed some screws into the tires for extra traction, was a quick remedy using just household items. Since then, my son has learned to steer and to whip it around. He has outgrown this one and we're moving up to a 16v.
The one thing we are truly amazed at is how durable this thing is. My son uses it everytime we go outside and we never bring it inside, except to charge. This Lil' Quad has been out in the elements (rain, show, wind, etc) and is still working wonderfully! I can't believe it will last for our next son! What a great buy!