For $300 usd, this tablet serves as a decent mobile workstation. 10.1 inch is the right size if you want to carry the tablet around for day to day works. However, with 2gb DDR3 memory, you might experience some lagging when you are browsing too many websites concurrently (~7 tabs on Chrome). I would suggest you not to play any videos in the background when carrying out other tasks.
The screen comes with a decent 1920 x 1200 resolution. That is what the 10.1 inch screen would perform the best, any higher resolution would make no differences unless you are viewing a 12 inch. 12 inch is now becoming the mainstream for tablets but in my opinion, a 10.1 is well balanced size for mobility and performance.
One problem for all tablets is limited hardisk space. The Miix 3 -1030 comes with 64gb storage which is far from enough for movie watchers. I had purchased an extra micro SS card to make up for that and you probably would also want to. The durability of the battery is also disappointing. Although it is stated the battery could last for 8 hours upon fully charged, under continuous use with occasional video watch and web browsing, the battery can run on 6 hours without charging.
The detachable keyboard although is not an unique feature of Miix m3-1030, it does worth mentioning that this gives the user another option if they want to travel light without the keyboard.
Last but not least, Windows 8 is probably the worst part of this device. By any means I suggest you to upgrade it to Windows 10.