Just copy and pasting my feedback from the Windows 10 Mobile section
I'm using Build 10512 on my Nokia Lumia 822. This is my very first build and it's sort of a love and hate thing.
As a daily driver, with one word, the best I can say about it, is that it's "usable".
It is not without hiccups though.
The first and most obvious thing is when you turn on the screen, the time takes about 3 seconds to load. Thankfully you can unlock the lock screen even if the time did not load.
Secondly, the action center is sluggish, occasionally it works, and other times it's delayed or just does not appear at all.
A couple of crashes are expected. But enough about the bugs. How about Windows 10 Mobile itself?
I'm just really wondering why they're trying to redesign something that is not broke.
Pros
- Tile Transparency option, giving consumers options for design is always a good thing.
- Categorized settings
- Recently Added is great on the App list
- Texting from the action center.
- Office apps are moving in the right direction
- EDGE!! It loads sites that the old IE11 never did.
- Groove is headed in the right direction
- Calculator is now a Scientific Calculator and a Converter as well.
- Outlook Mail (but it has no black theme)
Cons
- A lot of the basic apps have splash screens on initial boot up. Even Calculator and Alarms and Clock
- People Live Tile is now circles instead of squares, MS should give us the option to choose.
- The photos app, I'm not so sure about this.
- Outlook Calendar does not have a month view and it has no black theme.
- Options upon options, it even gives you options to choose if Alarms and Clock can run in the background (Is this even necessary?)
- No default homepage option in Edge
- Cortana uses a white background and no option to change it.
- No way to rearrange the settings in the action center.
- the freaking STORE!!! what did they do to it. It's slow and just seems to be a mess.