This has been a great bike for both my boys, but they've grown and moved on. I purchased it new in May of 2020 when my older kid turned 4 and it was a great transition from the Strider bike albeit a little tall at that age. I'd say 5-6 is the sweet spot for most kids. Some scuffs since it's a kids bike, but perfectly functional.
You can read all the specs are in the review below, but some highlights are a reasonably light weight, single speed, 16" wheels and mechanical V-brakes with levers (not coasters).