Slow, Small screen, Bad camera, Low quality screen, Tactile buttons which can get a bit annoying. Overall this is a good starter phone, or something you can just bring with you for a trip so you don't risk loosing a more expensive phone.
This phone is good for its price tag, but for everyday usage, it isn't the best. It is not recommended if you can get a better phone. Its just not that good of a phone for normal use. The below specs will explain to you precisely why.
I can't imagine being very happy with this as a phone. However, it supports a 128 GB micro SD card and Chromecast as well as Bluetooth. It makes a great little mp3 player. I have all of my music, as well as over 100 gigabytes of subscription music downloaded for offline use. I was able to delay buying a new phone until the Nexus 6p with 128 GB of internal memory came out, and I still use it everyday. I never signed up for service but it seems to get a good signal, I think I could call 911 if I needed to. For my purposes, an excellent device, thirty dollars well spent.