It is a great idea. It feels like a feature missing from Google (and probably impossible for Google to deliver being hampered by material design)
It has a lot of options, even allows you to search ONLY the Text/Title/URL and you can filter by usage right (free for personal/commercial use etc)
Interestingly it was last updated before material design was a thing. Maybe it's nostalgia but I love the design language of Google had before material injected padding everywhere.