Awful
While it worked for the majority of convention attendees (75%), it said it recognized my email and registration, but never showed me the event or schedule. Tried several times to reinstall (even after an update) with no better success. My last attempt said My password was incorrect and then said “there was an error” and never sent me a reset email. Tech support was pretty responsive over email, but kept telling me to do things I already. Finally sent me a reset code via email but the convention was half over by then.