I like the ease of use, it's very simple to set up an account with some basic info.
The only thing that I don't love about rainloop is the inability to have multiple users or different accounts per user. It would be nice if you could do this, but other than having more people in your household using one account isn't really possible unless they are all over 13 years old. We've solved our problem of not finding out when we missed something important and how we want to communicate with clients through emails as well as being able to see who has looked at what documents so far.