What is the most reliable online store?

I'm curious to know, which online store do you consider to be the most reliable? Are there specific factors you take into account when evaluating the trustworthiness of an online retailer? For example, do you prioritize customer reviews, the length of time they've been in business, or the security measures they have in place to protect customer data? It would be great to hear your thoughts on this matter and any other criteria you might use to determine the most dependable online store.