In "Hard Drives" there is:
Used space: 189,38GB (50%)
Free space: 183,22GB (49%)
that means 99% = 100%; of course, there is an error in calculating rounded percent numbers. It would be better to show percents in two decimal numbers with the right rounding (-> 49,17% and 50,83%).
The motherboard and the CPU could also have its own temperature indicator because it's very important for advanced users to know what the temperature of these parts is.
You can also add the speed of cooling-air fans in the computer (in RPM).
If I have any other suggestions I'll write them into this topic.