- The interface is overwhelming. While I understand that you aim to surface power, I think you're not targeting a specific power well enough to cater to a user's needs. For example, if you aim to help a user find deals, you should develop an interface that targets that super power.
- Related to ^, I'm wondering why a user would ever need some of these features... like why would I want to search by hidden keywords?
- Re: branding. I feel like you haphazardly went for a 5-letter dot com, when you could have done something more memorable like amazonhunter.com