NEC SL1000: What is so good about the NEC SL1000 IP phone IP4WW-24TIXH-C-TEL

Well what is so good about the IP Phone IP4WW-24TIXH-C-TEL of NEC SL1000 compared to it's digital phone IP4WW-12TXH-A-TEL & IP4WW-24TXH-A-TELrange?

Let me discuss in detail on the goodness of using this IP phone for NEC SL1000;

1. It has soft keys (with extra indication for Voicemail, and Call List) => see the screen shot below
2. It has backlight
3. It has delicated headset jack
4. The handsfree is full-duplex
5. Using this IP phone it don't require any licenses (license is required only when deploying 3rd-party SIP phone)

Screen-shot of NEC SL1000 IP Phone IP4WW-24TIXH-C-TEL;