We bought this bike for my 4 year old at the beginning of year. There has not been a day that he has had it that he does not ride it. His balance was shaky at first though he still loved it. Within a day he was off like a shot navigating the many turns to make it around the kitchen island, dog, and anything else in his way. This bike had great tires for indoors and outdoors. I've read that the other non-inflatable tires do not have traction in the house. He's never lost traction on carpet or hard wood. He zips through the house and really takes off outside. I have had to replace the inter tube on both tires but from the use he gets I have no problems with that .Not to mention he is really hard on it. Standing on the tires ,reaching things off the counter , slamming into the walls and doors (we have a long hallway that he builds up speed and likes to bonk the doors) I actually bought it off another site but have used Great Offer Stock in the past and they are great. Mostly I wanted to write this because it has been the best toy we have bought him ever. Sure beats the stuffed animals that look cute but sit in the closet or toy box until they retire to goodwill.