I bought this bike for my 5 yr old son who started on a 14" wheeled bike. Height wise he is just at the minimum for this bike, both in height and inseam. I didn't want to spend the money on a 16" wheeled bike that he might quickly out grow. The Alpha Three's frame is very accommodating, and will fit him as he continues to grow. It is truly a gorgeous looking bike. Right out of the box everything worked great. I only had to adjust the reach on the brake levers for his smaller hands. The shifting works great, and I like that the bike uses QR skewers and a traditional seat/seatpost design. I lowered his seat and moved it forward. I'm so glad I found out about this bike as there was nothing else out there this flexible with rider size. I wish the brake levers had more of a bend in them, so he could reach them a little better without straining his hands, but I do understand that this style will be more flexible in the long run. Thanks for an amazing bike, an easy shopping experience, excellent customer service and super quick shipping.