Here are some of my thoughts on the collections flag.
I love the idea and find myself using this for projects and fun more often than I thought I would, however some things can be added to make it better.
1. Unless I'm in a new tab page, when I click on a page, it should open it in a new tab, transport me to the new tab, but still leave the collections side bar open.
2. The collections should syncbetween devices and browsers.
3. The open in Word and Excel are nice features, I would have never thought of adding them. However, when I click on them, I'm taken to the online version of Excel and Word instead of the app. I feel there should be a button that appears (after you hit for example, Send to Word), that has two boxes that say Open in App, and Open in Web, and even have an option to make one your default so you can skip that step.
Let me know your thoughts on my opinions and any other ideas you have.