We bought 5 of these phones for our business. We have warehouses around the country and the guys on the floor need to be mobile but contactable. We've used DECT for years but have recently upgraded our wireless network in the warehouses. For this reason we went Wi-Fi.
The phone itself is really good. It is basic but that's all you need. It is really lightweight and simple to use. The battery life is quite good and it doesn't need charging up that often. I would recommend to anyone who has a good wireless infrastructure.