Not many because that is a very fresh image made with the finest software ingredients, baked in one of the best artisanal/traditional build servers, following years of traditions. Certified Organic 
The Image used was created like yesterday, or monday.
“…from a Windows PC or Mac over to a Linux computer…”
Fortunately, I surgically removed Windows from my life 8 years ago, and have never regretted the loss of any Microsoft app. Everything I personally need can be found in Linux software, and without the usual MS headaches. I do use Android right now, but I’ve disabled as much googlefornication as possible without replacing the OS entirely. So, I’m really excited about this first step in freedom-respecting mobile. With the entire Debian ecosystem available to app developers, I have no doubt the application base will grow quickly.
Again, I’m sure I speak for everyone when I say we can’t thank you guys enough!
Well said.
And let me add that I will hate and envy you (well, slightly) until I get mine
Also, I contributed to the campaign on 7 September 2017, if anybody cares to know that. I was originally offered Chestnut.
I contributed 11 Jan 2018. I shouldn’t be too far away then I hope-. I didn’t save the email and can’t honestly say I was offered an earlier model or not.
Very excited for you! Can’t wait for pics, videos and you overly long, nothing left out, detailed review 
Congratulations on being the very first 
I have a question: What is your local PureOS username?
I ask because what I imagined was that I use simply myFirstName as user name like I do it on classical desktop Linux. I have already a Pinephone PMOS edition. At setup I input myFirstName as username and choose to encrypt storage. Now whoami returns “user”. So thats the username I operate on. There is somewhere myFirstName for encryption or so. Also the PIN to unlock the phone is the password for root, but different from my normal password. I think it is not the best decision. PMOS also uses phosh.
So how is it with PureOS on L5? What does whoami return?
The command whoami returns “purism” even though I’ve created a new username and password for myself. I also restarted the phone.
We disable the root account in PureOS on the Librem 5 so there is no root password. We currently just use a default “purism” username on the Librem 5 as well.
disabled root account['s password] I presume (as in passwd -l)
To get more technical we go a step further and lock the root account. You can see the specific merge request here: https://source.puri.sm/Librem5/image-builder/-/merge_requests/123
Not many because that is a very fresh image made with the finest software ingredients
…there are some updates in -staging waiting for migration already though
yup, thanks, --lock-root-password that is, no fancy uid remaps
There was one update to download. Check for updates by opening PureOS store.
Preloaded apps:
Phone dialer
Messaging (Chatty)
Browser
Contacts
Calculator
Chess
Clocks (time, stopwatch, alarms)
Document Viewer (i.e. pdf)
Email client (Geary)
PureOS Store (software/app downloads)
Settings
Terminal
Text Editor (notepad)
Usage (system monitor)
Weather
Observations (and I’m still learning the OS layout/actions:
Switching between pages/settings/apps is a little laggy, but not too bad. When switching between apps, you’ll first see the last app you were in before it switches to the newly selected app
Entering location name for weather, time, etc., takes a few seconds to populate with known place names.
Touch responsiveness is better if you let fingertip linger on the screen for a fraction of a second.
Phone calls/SMS work. Will report on MMS later.
Internet works.
I’m disappointed to see no dark mode. (Maybe coming later?)
Phone boots up fast.
Doesn’t appear to remember Screen Lock OFF setting. Requires entering unlock code. (And you can set your own code.)
I don’t see a way to display the contents of the drive, unless you can do it through the terminal.
Bluetooth file transfer with another device works, but I don’t know where the file downloaded to on the Librem 5 (because of above).
Can’t figure out how to get phone to default to my time zone. EDIT: Figured it out: Don’t select Automatic Time Zone. Then you get a world map to choose your time zone.
I don’t see a VoLTE setting in the mobile options. (I’m using an AT&T MVNO.)
Never mind…it’s in Usage (system monitor) under “Storage”. All the expected items are there: Desktop, Documents, Downloads, Music, Pictures, Videos, Trash, etc.
In my Downloads is a photo I sent over bluetooth, but I can’t seem to open it even though it registers my touch.
There are thermal sensors for the vpu, gpu, cpu, and battery. Cool! (The phone is actually warm, though.)
Queue jumper. 
You may not have a default image viewer set. If you go to PureOS Store and search for “Firefox” for instance, you will be able to install it and it should automatically set itself as the default image viewer.