The free version allows for 10 articles per month to be sent. Pricing options are reasonable. The article I sent was perfect on my Paperwhite. So far, a good extension.

I've been using this app for a long time and it was a big reason for my sticking with my kindle as a reading device. However, the inability to utilise the footnote function (where readers can touch/select a footnote in a page and it will appear at the bottom of the page) rather than having to go all the way to the end of the document, is a real shortcoming. I'm familiar with arguements against footnotes - i.e. that they are a distraction, but if an author inculdes them in a text it is surely because they think it important and it is then up to the reader whether s/he divert her attention from the body of the text to read the footnote or not. In any case, having to go to the back of the document to read them is a much greater distraction. It would make this addon that much more useful-- perfect, even, if it had this feature.

I've bypassed this addon for so long because I'm using Pocketbook and the addon's name screams "I'm for Kindle users only!" You should change its name to Push to e-reader. It was pure coincidence I found out Pocketbook users can use it too.
EDIT. as for localized letters converting to symbols, well, I can't seem to replicate it to send you some sample url to investigate. Hopefully this means problem is gone.
Sadly, there is another problem. I'm premium Wyborcza.pl subscriber, I see fully displayed articles, yet they are sometimes pushed partly - generated file only contains few initial paragraphs.

Very good addon - thanks a lot. Only thing lacking is some options to format text before sending. Any chance this could be possible in future update?