Just about 24 hours in. Switching from BLU Win HD LTE as my backup to a $30 Lumia 640 GoPhone. I've already ordered an Orange battery cover, a clear snap on case and a Tempered Glass screen protector off Amazon. Total investment ~ $55. Can't beat that with a stick.
A) Lumia Firmware is still a value added package
B) Camera seems nice from the couple of pics I took. I'm sorta used to playing with budget phone cameras and this looks easier to handle than BLU's 8 MP shooter. That Lumia difference again.
C) Size, weight, texture... This is a nice phone in the hand
D) I've had SD 400 and 410 models with 1 GB RAM - It's cool. My expectations are scaled accordingly.
E) Nice screen. I prefer IPS, 5" is a good size and the 720p @ 294ppi looks good to my eye. This is my new minimum standard and I really don't need much more. I'd rather have the battery life than a "Gee-Whiz, wouldja lookit dat" screen
F) My first
Sony phone with Double Tap to Sleep on the software nav bar. LOVE it.
G) Glance, DTtW, Brightness and Color Profiles. Awesome for the $ and more Lumia firmware coming through with ClearBlack tech.
H) The microSD slot is actually more capable than the one in my 1520: SDXC vs SDHC
I) Battery life promises to be decent at 2,500 mAh and it is Li-Ion vs BLU's Li-Po
J) Moving on to Windows 10 Mobile 10586.107 right away via Insider Release Build is priceless. My first daily driver with W10M and I'm really looking forward to it.