Battery life is the ONE good thing.
Where shall I start.
No 1 by far, the speaker volume is way way too low in anything other than a dead quiet environment. Turn it up to full volume and the sound distorts. I'm constantly having to press it really hard against my ear to try and shut out background noise just so I can have a conversation. My old Nokia, the earpiece volume went loud enough almost to use it as a speaker phone.
No 2, you unlock it by pressing and holding the * key. Far far too easy to do by accident in your pocket, then you end up dialling some random number. The old Nokia needed 2 different button presses in a short time to unlock, and never unlocked by mistake.
No 3, the auto lock time out is either 5 seconds, way way too short, or none at all. the Nokia had a more sensible 30 seconds.
No 4 the display. When looking at say your contacts list, the block of text displaying the number is cunningly designed to be 2 digits shorter than a telephone number. So they "correct" that by scrolling the number sideways. Trouble is, it's a crappy slow display, so the scrolling number pulses on and off as it scrolls due to the slow display update making it hard to read.
It does make and receive calls. that's about all it's got going for it, but the user interface to me is a lesson in how not to implement a user interface.
I suppose it was also cheap, but when this one fails (if I have it that long) I won't waste a breath trying to find a new battery for it.