Mongoose Montana Boy's Mountain Bike 24 Inch Wheels is a good buy. Well, I've been looking at it and to me it looks as if it is a good "in-between" product for 9 to 10 year old boys. It is not the complete heap of scrap that the normal boxed kind is, but it is also not as expensive as the up-market kind you will get at a specialist bike store.
Mongoose Montana Boy's Mountain Bike 24 Inch Wheels is strong bike, yet it has good gears to teach your little one how to use the gears. This bike will be able to stand up to the abuse a 9 or 10 year old boy is going to mete out! Yet it will teach him the basics he needs to know.
If you like going on long rides as a family, well then this is a good choice. Once he outgrows this bike, he will be ready to move on to a more "professional" bike and you will not feel you have wasted a lot of money. This is a reality, he is going to outgrow the bike very fast and spending more is simply a waste!
So, looking at the Mongoose Montana Boy's Mountain Bike 24 Inch Wheels may not be a bad idea. Go there now and keep the 15% discount you will get from Amazon in mind.