The thing that would make me, as someone who is recruiting heavily right now, not want to use this is that I fear it will be a massive turn off to really great

The thing that would make me, as someone who is recruiting heavily right now, not want to use this is that I fear it will be a massive turn off to really great engineers. If I was interviewing with a company and they made me do this before talking to them I probably just never would. If my first interaction with them isn't an opportunity to also sell them on the company/opportunity then the first impression is hugely suboptimal. I'd rather waste time on 5 phone screens and have 1 really great one where I get a chance to build a connection with the awesome engineer, it greatly increases the chance we'll end up hiring him or her.