I bought one of these and activated it on Straight Talk while my G3 was getting its screen repaired (a small hairline crack that made it impossible to actually use the screen, yay).
My impressions were similar: they cheaped out on a few things that would make the device almost unusable for me. The screen would have done better with nothing more than better viewing angles; the resolution and dithering were weird but not something I couldn't get used to, but the viewing angles are almost impossible to nail and the inversion of the colors gives me a headache.
By far, the biggest frustration was the 512MB of RAM. The Snapdragon 200 is a surprisingly solid performer, but when browsing Ars occasionally the entire page would have to reload while I was scrolling down because there wasn't enough RAM to display the whole thing at once.
The camera was actually way better than I was expecting. Under the right conditions, you can actually get a pretty good shot.
Battery life is awesome, at least in comparison to my G3, which only gets a few hours of screen on time. The Sunrise has a 1540ish mAh battery, which is small by today's standards, but since everything else is pretty low-powered spec-wise it all adds up to me never getting less than 6 hours SOT and being surprised by how much battery life I have at the end of the day.
That all said, I came from an LG G3 with a QHD screen without a single bad viewing angle, a Snapdragon 801, and 3GB RAM. My mother-in-law I gave it to, on the other hand, came from a Samsung Galaxy Centura, a phone that retailed at $100 from Straight Talk and had similar specs. Its battery life had gone down to about 1 hour of SOT despite having the same amount of RAM and storage, a significantly weaker processor, Android 4.0, and a smaller screen of the same resolution. My mother-in-law is utterly floored by how well this phone performs in comparison.
You just have to go in with the right expectations. If you're going for something that performs pretty well, you'll want to pay a bit more and get a 2nd-gen Moto E or a lot more and get something like the Moto G, OnePlus X or the LG G3. (Or even more and get something like the Galaxy S6, LG V10, Moto X, OnePlus One, Nexus 5X/6P, etc.) But if you're content with something that's "good enough," then the Sunrise should be fine. It's never going to be great, but it's fine, and that's all you can hope for when you have a price point this low.
EDIT: put some spacing between the lines so as to not create a wall of text.