Here's a question: How did Amazon know it was time to make a $99 tablet? Because of focus groups? Its ace marketing department? Close: user reviews. Let's not forget that Amazon is best known for its retail empire, so when lots of people start buying cheap tablets, the company catches on quickly. And when shoppers start giving them lousy user reviews, well, Amazon notices that too. After reading lots of write-ups from disgruntled customers about tablets with chintzy build quality, the company decided it could do better. The Fire HD 6, a 6-inch tablet priced at $99, is the company's cheapest and smallest slate yet, and it's designed to take on all those unreliable no-name devices that shoppers seem to hate so much. Suffice to say, it offers some great value for the price. Here's why.