I love KDE and am a daily and heavy user of Plasma, but the Itinerary app didn't work for me at all. I installed it from F-Droid and planned on adding a trip to a convention I am attending in August, but none of the steps of my trip worked. I tried adding the train trip, which wouldn't work because the search for the first station didn't return any results, and there was no button to add it anyway. I tried importing my ticket to the convention and the booking confirmation for the hotel, but both gave an unhelpful toast notification saying "Nothing was imported". If it can't support any of the steps of a trip, I don't feel like this is ready for production. Another (albeit minor) gripe was that you can't swipe from the left to open the left sidebar, forcing you to manually click the hamburger button in the top left of the screen, which is annoying when using a rather large phone.