I am going to side with the "don't do it" camp here. Just don't. Not worth it.
Email notifications don't work, heck, even SMS notifications stopped working for some reason! I use my phone to get notified about work-related emails or texts, but now that even that part of the system doesn't work I've lost my patience with it. I need a reliable phone damn it, not a pocket version of Windows 10.
Not to mention the terrible battery life.
Another thing, Windows Camera, sigh... Just why??? Before, my Lumia 930 used to take beautiful pictures. However, now that Microsoft has decided, for some reason, to shut down Lumia Camera and replace it with that horrible Windows Camera, I'm embarrassed. Embarrassed to show my friends those awful pictures my 20 Mpx phone is taking now.
And those things are just the tip of the iceberg of problems I've had since I "upgraded". Just stay with the good old 8.1 people.
Before, I would recommend Windows Phone 8.1 to anyone, now I just try to avoid talking about it because it is embarrassing how bad and unreliable w10m is.