Congrats on the launch! You have a great start to a tough problem. I've been running a collaborative travel planning and booking platform for over two years – it's an exciting space and there's still a lot of opportunity in the multi-person planning space.

Some feedback on the product:

1. Collaborative features seem a little buggy. I registered and then shared the trip with myself in an incognito window. It was easy to trip up the document sync – try to make an edit in incognito and then make an edit to the same element in the registered window and the document gets out sync.

2. Input validation needed for links. I entered an incomplete link (google.com) and it treated it like a relative link, which broke the trip.

3. Is it possible to scope searches? I searched for hotels in a city and the initial results seemed centered on my destination but the rest of the list was from other cities or states.

4. Default map zoom is inconsistent. I started adding locations but all of the pins were on top of each other at the initial zoom level. Managing zoom level as the itinerary fills out will help keep the trip in perspective.

5. I could see edits made in different windows, but was unable to see who was online? Is that part of the UI and I missed it?

Some business feedback (for what it's worth) – figure out a monetization strategy fast. There are a lot of planners in the travel space but not a lot of booking solutions for groups. Affiliate links are okay but still leave a lot of money on the table. I'd be happy to talk about what has worked for us if you're interested – email is in profile. For those interested, my company launched https://www.lunamoons.com as a B2C collaborative planner but we recently pivoted to a full service platform (think squarespace for travel agents) which is live at https://www.trips.app. We tout our trips as google docs for itineraries, but maybe less doc like (i.e. https://sample.trips.app/sample-itinerary/rapid-flower-8635/...)