I just purchased one of their lower end (ST35) models for when I go on my long distance hiking treks, so needed a weatherproof phone with a decent battery life, for navigation apps and listening to my audio-book collection whilst walking and in the tent, in the evenings.
I couldn't care less about the camera quality or 'gaming' performance as I simply didn't get it for any of that.
Battery life is very good, keeping it in airplane mode and low power battery, when not using the navigation apps, and 5-8hrs of audio-book playback a day, I get at least 10 days out of it before needing a recharge.
The only real criticism I have of the phone is the touch sensitivity of the screen is on the weak side, sometimes requiring more than one attempt for it to register my inputs.
For only $140, I'm more than happy with it as it does everything I need it to and nothing more.