I Have bought loads of these for my company and they work great. The only two things that is a bit annoying is that when they get delivered the safety-label is quite hard to remove since it's stuck in one of the outlets, but that's only a problem the first time you use them. The other thing is that the springs on each side of the outlet sometimes is a bit too tight to fit the contact in between. You can always spring them back one at the time and the problem is solved.
When it comes to the cable I think it's a bit stiff. Would like to se a rubber-cable but for the price it's not something i expect.
It's good for the price you pay.