I have owned this phone for over three months. I find it to be a star performer for a budget phone except in one category, the camera. I am very disappointed with the camera. I got the phone for free on Metro PCS, so what do I expect.
Other than that the phone is great! The 1.3 Ghz Processor and 1.5 GB of RAM do keep the phone from lagging. I find the On5 to be very responsive even with multiple apps running. The battery lasts me all day with moderate usage. I am a ham radio operator and NWS weather spotter and the apps I have on the phone work well.
The 720 X 1280 screen is crisp for its class. Colors are vibrant and even my videos are clear and vibrant. I can tell that I do not have an AMOLED screen though. The audio in the earpiece is excellent and I like the extra volume setting for when I am outdoors. The speaker phone is good too, loud and clear.
Overall I recommend this phone if you are on a budget and intend to go with T-Mobile or Metro PCS.