3 stars: I think you might need to look at some network issues, and some stability problems. Seems like the app can't cope with changing network conditions without a full relaunch.
4 stars: Great app for keeping track of all the goings on at the conference. Would be nice if the maps were more helpful and less generic. I'm going to room F, point it out on the map.
4 stars: Pretty useful. (However it took me a while to find the venue floorplans - wasn't at all clear that the building shapes on the campus map were \
3 stars: Buggy. Does not appear to have offline storage, so if you don't have 4g or wifi, you cannot see your scheduled sessions. Somewhere things, like finding out where lunch is, are not listed.
4 stars: Loads slowly, lazy loading be damned
3 stars: Catalog is broken right now and there's no way to ask anyone about it in the app.
4 stars: Much improved over last year. Looks like they have just added 'other sessions' functionality which makes scheduling much easier
3 stars: Gotta reboot the app every time I add something to the calendar and want to see it.
4 stars: Better than the website for planning
4 stars: It's working ;-).
3 stars: Pretty easy to use in 2018. Few notable gaps - does not allow easy filtering by time. Transportation section isn't very easy to use. Also quite slow, not as bad as 2017
4 stars: Great way to get ready to organize your Re: Invent. I wish there was a 3-star rating process for all the sessions...