Had my 640XL for just over a year now. Updated last week to Win 10 and Anniversary update.
Really enjoying the phone.
Big pluses for me that I've noticed...
SD card read times are faster... 128 Gb card, 80 gb music, 3 Gb photos, really quick now.
Love the transparent tiles for the App icons, superb.
Glance screen and double tap to wake and sleep still there, I love those features.
Battery Life as good as ever, Stand by slightly better, 3% over 8 hours.
Still have just under 3GB spare of Internal memory.
By far the best value for money phone I have ever had.
My original review, September 2015, below...
Hi, new to the forum. Have been looking here (and elsewhere) for my next phone (coming from an HTC Mini). Finally got the Lumia 640 XL and a 128 Gb Lexar Micro SD Card.
All I can say is... Brilliant. For what I need it worked out BY FAR the most value for money (more so than I could have hoped for).
I have spoken to a guy at work who was anti Windows from a few years ago. Showed him mine and he bought one the next day and loves it.
For me I needed...
Big Screen.
Big Storage (Music, Photos, Videos).
Good Cameras.
Removable Battery (ability to have a swappable spare if needed).
Over a Day's Battery Life.
Good Telephone conversation quality.
4G LTE
Decent Music Quality Playback.
Sturdy Construction.
Good Visibility in daylight.
Email.
Text.
Browsing.
Skype
Viber
FM Radio
Off Line Maps
I am more than impressed. Brilliant Device.