ESRI's10.3 Help Documentation is out and wow, it is...different.
I myself preferred the legacy format over the new one but I'm interested to hear what others think about it. If you haven't seen it yet, hop on over to Help | ArcGIS Resources and click on the product for 10.3 you're interested in. Do you think the new design is an improvement?
Personally, I'm finding it to be a little less detailed than the legacy documentation format and I'm having trouble finding things. Hopefully though, that's just because I'm not really familiar with this new document structure yet.