My son absolutely adores the bike. This means I adore the bike, because he wants to ride it, and he wants to ride with me!

He can keep a 10-12 mph pace on it. He has his own cateye and loves seeing the data.

They actually make it in one size smaller than the 650, called the Ace 24, i think. it must be tiny.

Really the only thing I would change is the small front chainring. It's a 42/52. That's quite a bit bigger than a compact, and he feels it. The 13/28 cassette in the back helps, but frankly, not enough for him. Seems really odd that they choose that. I know I'd be feeling it if I lost my 34 ring.

Also be aware that small frames like that can generally only accommodate one water bottle holder, so on long hot rides, it's a consideration.