I love that it has all of my travel information in one place, so there is no need to search for things separately. Sometimes it takes a while for it to sync with my phone, but once it does I don't mind at all. I wish they had more options on how to sync my data, such as exporting my calendar appointments to a Google doc or something like that. This saves me time by having everything right there, plus it is also easy to share with friends/family.
I've used this app to plan trips to Europe before