Bought these to give my knees some extra support while jogging/cycling; and it seems to be doing the job. They are pretty good value for money as well since they cost a tenth of what 2XU would have cost. (I have never used 2XU so can't honestly say if they are or are not worth the money....but can't imagine how they would be ten times better to justify the massive price difference for me.)
Opted to get the size that i fell in according to the size chart rather than going up a size or two like a lot of reviews suggested, and am happy with the fit. They provide tangible compression without compromising on comfort or mobility. However, if you do not want too much compression, going up a size wouldn't be a bad idea.