Was going to play some 1st Ed AD&D yesterday. Didn't quite get around to it, but I did get to my FLGS and pick up a copy of the new limited reprint of Unearthed Arcana.
As with the first reprints, these are very similar. Though these new ones are supposed to include all the errata. I have not looked closely enough to be able to tell.
The only main difference outside of the covers and errata is the copyright page.
It fits in well with my other reprints.
Unlike the PHB, DMG and MM there isn't a page for the Gygax memorial. I don't think and have not heard if any money from this is being donated.
In any case this is a nice book to have. Unlike others of the old school mindset I don't hate UA. In fact I rather liked it. I loved all the new spells and class options. The cover is not quite as iconic as the others, but it looks fine here.