I really like the ability to quickly see route information with times and associated alerts for my home station, and with multiple instances of the Plasmoid I can keep track of several stations quite easily at a glance. The journey features are also indispensible.
Using it with Contour, which is getting support for random Plasmoids in addition to the Nepomuk-derived resources that are associated with an activity, is going to be very, very nice for someone like me who travels a fair amount: I'll end up with one Activity on my tablet per trip with all my files, contacts and even transit information agregated in one place that I can switch to with a simple thumb swipe. Oh, yeah!
A new version was released today and I noticed that the author of Public Transport has put together a set of polls asking people what they think of the UI changes in the new version, which transit systems you use it with and how you get and install it.
If you're a user of Public Transport, register your vote to help Friedrich know how to continue improving it. If you aren't a user of this Plasmoid and you use public transit in your area .. go install it and then go vote. ;)
Contributing new transit system backends or improving the existing ones is probably also very welcome. I noticed recently that the SBB backend doesn't seem to work nicely for journeys anymore, which probably has to do with their recent website upgrade which changed things significantly. Since the SBB doesn't provide a public API (though they have one!), Public Transport is just page scraping which is pretty brittle. I don't know if that is the cause of the errors, but I wouldn't be surprised. Anyone who wants to give me a nice gift could fix it up (I unfortunately do not have time right now to do so with everything else on my plate *sob*). :)
.. and in case anyone at SBB is reading this: open up your API already. It's public information and you're only hurting the society you provide service to with your policies that come straight out of the dark ages.