That's what my son had. Quality was so bad I would never, ever buy a bike from Giant again as I would not want to support any company who could sell that junk to kids.
Rear drop-outs were not lined up so rear wheel was sitting very squint. The only way to fix it, sort of, was to hold the wheel straight before bolting it up.
Rear derailier kept dumping the chain off the small gear jamming it between the gear and frame. Never managed to get this fixed.
Worst fault was brake cable nipples pulling through lever brackets with a bang, resulting in a loss of front brake! Pretty unhappy about that one. Turned out that the hole in the bracket was for a different nipple shape.
There were other niggles but the general quality of the components was quite poor and another significant point is that the bike was 'very' heavy. As it is designed to look like a full suspension frame it is much heavier than it needs to be, and also very back-end heavy. Basically these are cheap, made in Taiwan/China bikes with little real care going into quality control or usability. We now have Specialized and Scott kids bikes in the shed and, despite the fact that they cost about the same as the Giant, the build quality is miles better. Still far too heavy though and to be honest, if I was buying the kids bikes today, I'd buy an Isla bike..