I have GIVI E52 top case for the last 10 years and have no problems.For potential CooCase buyers: you get what you pay for, skip the CooCase and get the Givi--while I have never owned a Givi, it's got to be better than the CooCase.
Yes it lost the shine and colors but it works fine for me.
I do abuse it and often overload that case to the double/triple of it's limits.
But for the budget, before I spend the money on the CooCase, I would go with Bestem Model 929. Pay 70 bucks and you get your self a 46L top case with an LED lights and mounting plate and the hardware. Add 30 bucks and you will have a liner too. I installed it on my F650CS and have no problems. The lock is not the best but for the money, I have no complains.
Here is the link.