My phone didn't hold a charge well.
My phone couldn't use basically any app except Chrome, and 90% of sites gave me ssql connection errors.
And, apparently, it being a 3-4g phone means that it was going to be shut off sooner rather than later.
On the other hand:
I hate it.
It's bigger. Clunkier. It's wider, it's heavier, it's harder to hold, it has no magnetic cover/case, it didn't come with a charger capable of being plugged into anything except an outlet, it won't make the same noise for calls or texts, and it doesn't make a noticeable sound when I interact with things on the screen.
That, aside from the fact that I'm not sure that it's "power conserve mode" works as well as my previous phone's eco-friendly mode did; I'm not sure that it will be as impact-resistant as my old phone; I'm not sure it'll be as waterproof as my old phone was; I haven't figured out how to remove all of the junk apps/clutter from the phone or sorted what is junk in the first place (I disabled/uninstalled some, but not nearly the amount I need to), so the phone has a whole bunch of unnecessary clutter that bogs it down.
I haven't even figured out how to browse on the phone yet.
I also need to add in all the contacts that didn't get ported over. (Only half were.)
So, mixed bag. Necessary, but I hate it. It's like moving from Windows XP to like...Windows 8 for me--not Windows 10, which is bearable/tolerable. Windows 8, from Windows XP. Technically, an upgrade in both hardware and software. Necessary for the future. But a lot more clunky with a bunch of junk, made for a younger generation.