UXtweak - online user research and usability platform - opinions?

UXtweak is a new platform and I believe it could be very interesting for UX designers and researchers. Besides that, I am working on its development and would love your feedback and opinions on it.
Please, check it out.

It offers a combination of features: online unmoderated task-oriented UX studies, user recordings with advanced filters in search, tree testing, card sorting, prototype testing (currently in BETA).

Thanks for your feedback!