It's here! It's here!
So, if you "reserved" your upgrade, they are rolling them out now. Based on the computers in this house that had reserved upgrades, I do believe they are sending them out to devices that are most likely to be optimized for them. Ie: my brand new laptop with all the frills got the update notification yesterday, the couple years old computer hasn't yet. If you didn't "reserve" your upgrade, you should do that because you can't just upgrade on a whim. Jim didn't reserve his previously, so he's in waiting mode on his laptop too. It should be interesting to see which gets it first (the old desktop or his newer laptop that reserved later).
Anyhow - I was a bit flustered after the upgrade was complete as my touch screen and trackpad didn't want to work properly. A manual restart fixed that though. So, when you do the upgrade and all is said and done, restart it before you play around too much to make sure your drivers are all up to date as well. It's nice to not see that ugly metro screen anymore. It's more doable with it inside the start menu (YAY! My start menu is back!!). Of course, programs are officially called "apps" not programs anymore. But, when I open one it doesn't take over my entire screen making me feel like I can't get back to the desktop. More like traditional windows, and makes it easier to have multiple "apps" (programs) open at once. My computer feels like it's been truly merged with a tablet (which is good for me since my computer does kind of transform into a tablet) - I'm not sure how a desktop user will feel about some of the options, as they are not really useful to desktop users - but at least there's not a ton of bloatware.
The email program seems to work ok - although it gets a bit confused sometimes (I use 3 different addresses regularly - if you just set up one I'm sure it'll be fine). The calendar actually can pull your gmail calendar into it without too much effort. They've added an upgraded internet explorer that they call "Microsoft Edge" - meh - I like firefox and chrome better. The search function works MUCH better than it did in 8.1 - of course it's supposed to be competitive with Siri and Android's Google search function (the Google "bXXch" as I call it/her). It doesn't do a very good job of understanding what I'm saying as far as voice commands go - but my microphone isn't "optimized for cortana", however it does work well when typing into it.
10 does not come with a tutorial showing what's new - THAT sucks. So, I'm off now to find out what's new now that I'm using it...