At the installation I have made no bubble.
I advise still to go on the net to see videos on how to put a screen protector
It is the little that I regret missing their instructions are not clear on their website and I have not found any really good with video.
Ask a protective film that can not be improvised there are tips to know.
Regarding the use of any day I am very satisfied my tablet is clean and well protected.
I put 4 stars because for the price I would have liked to have a good manual.