So the testing results were good while the CPU was set at stock speeds but went downhill when the overclocked load test was performed. These results were mostly expected. Mixing small/low profile with very quiet cooling normally equals lower performance.
The cooler does the job Cooler Master designed it to do which is cool a CPU in a small amount of space, it does that job very well.
I see the cooler retailing for between £25 and £27. That seems like a good price for the quality you get with this cooler. This is a more specialist device, designed for small spaces.
Performed well at stock frequency
Very low profile
Very quiet for most purposes
High quality thermal paste
Overall quality of the product is excellent
Mounting system works very well
Could not provide sufficient cooling when used in the overclocked test
Noise creeps up under load