"Is this legit?"
Yes not only have I tested it myself, but it's easy to find articles verifying that they just got $65 million in B series investment funding I look for news like this because often, this is when a company will spend a lot to bring in new users.
IMPORTANT:
This means you MUST book using a work/company/organization email address(so no gmail, hotmail, yahoo, etc ) it needs to be something like You@YourCompany .com or Name@SomethingHere .org etc
Here's an invite link: Click Here! ←
There may be a limit on how many people can be invited through that link so if it stops working let me know and i'll try to find another one or remove the post.