I have most of chopin's works in the ekier edition. I think they are great, first with all of the personal notes in the beginning. There is also the guide-type thing, its a separate packet with more notes on the music. Again, it has Ekier's fingerings in italics and chopin's in bold, which gives some nice options, and it is an urtext edition. All of the Ekiers are very nice. My edition of henle beethoven sonatas does not have very good fingerings. I don't know about the Polish National addition. The ekier chopin concerto edition, has a couple spots where the orchestra part is written in, with the notes in a little different font. Don't worry, this does not make the piano part confusing to write, and all the pages and notes are nicely spaced out. If you some clarification don't be afraid to ask:)
yohankwon, a little bit more info on what? The actual concerto? Or the Ekier edition?
Do you have any works in the ekier edition? The format of all of them are similar. And while they are expensive, they are pretty nice
the polish edition has no fingerings
I see that you are familiar with jan ekier chopin editions, and so am i. The concerto is the same exact format yellow/gold cover, letters from chopin in the front, etc as all of the ballades, nocturnes, waltzes etc... Anything else? Hope I could help