This was a very cool phone and worked really well. Was one of my favorites before the smart phone boom. Performance It did everything it claimed it would. I was scared to purchase at first though because I thought of all the things that could go wrong with a light up and changing keyboard like that. All and all I was very satisfied with the performance. Voice Quality Worked great as just a telephone. No complaints in that department. Sometimes things would cut in and out but I'm pretty sure that had more to do with my service than the phone. Battery Life This phone had an okay battery life. Nothing too great, but it wasn't horrible. Durability This was a pretty durable phone. My brother took it from me when I got my iphone 2 years ago and he just stopped using it because it was running a little slow. Lasted at least 5 years and my family is very rough on phones. Ease of Use Very easy to use if you understand that it opens two ways and that the keyboard flips. My father tried to use it for a couple months and got really frustrated with how it opens both way. He felt like he was breaking it. Design Very high tech design for the time. Definitely a good buy.