After a week it is still sturdy. It does the job and holds both Huawei and Sony Xperia phones. The only thing I am sceptical is the rubber is very sticky and attracks dust and dirt to itself. It is so sticky and glueee so it sticks to fingers and if you drop it will gather dust and will not stick to any surface anymore.
I am afraid it can be one of those which will melt under the hot sun. Sadly I can not test it yet due to bad weather here in the UK. I have had similar suction cup before and it took me half a day to clean up the mess after it melt. Hopefully this one will not melt, I will update this post in a couple of month.
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