Ubuntu Mate on Raspberry

Today, I have install my raspberry PI 2 using ubuntu MATE. It's quiet interesting as previously I only use my raspberry PI 2 for Web Server (LAMP) and today I try it for Desktop. 

First tough it's will be laggy or under perform. But it's shock me, you can see that 4 core CPU the highest only 41% and the rest are lower; the memory usage only 59,5%. Thats not in idle condition, I have open GIMP, Libre Office, Chronomium and Thunderbird.

So, do you guys plan to use ubuntu MATE ? In my opinion this ubuntu MATE work very well on Raspberry devices or Old laptops.