As it has evolved from digital storefront to ecommerce empire, Amazon built up a lot of trust over the years. Now it's testing the limits of that trust with Amazon Key. It's a simple enough concept, which really solves a problem: The main thing Amazon does is deliver packages to your door, but there's always the question of what happens when you're not home? In many cases, that package may find a different home if it doesn't get through your door right away. Amazon Key, which includes a smart lock and security camera, will let the delivery person in your front door and let you keep an eye on them -- from wherever you are. In cities, where lots of people live in apartments, the idea has a lot of merit. It also has a lot of connotations Amazon would like to avoid. The company is already a presence in many households through its Echo devices and Alexa voice assistant, and Amazon Key feels like a bridge too far. It also speaks to just how much we're willing to allow tech companies to encroach into our lives in places we'd never trust the government. In this week's MashTalk podcast, the Mashable team unpacks what Amazon Key means for the company and tech in general, and answer the question: Is it worth the tradeoff? We also discuss the company's now-bloated line of Echo devices. But is this really fragmentation, and even if it is, does it even matter for a voice-powered device like the Echo? Finally, we reveal the gadget you should definitely get this holiday season. And -- surprise -- it's from Amazon. Follow @mashtalk on Twitter.