love that they are so flat - good when my laptop is closed. Getting them on was fiddly to say the least, especially lining up the hole for the camera and ensuring didn't cover the light meter. The piece of tape they supply to help you position it is good - a simple yet effective tool Had to ask for an invoice for this as is tax deductible for me. got one but not helpful ...date is the date they wrote the invoice, not the date of purchase, and currency and tax are all over the place - not even in the currency I purchased it in. Amazon shake of any responsibility for follow up with their sellers.. they should at least have a standard code of practice....e..g supply tax receipts in correct currencies and tax format without having to follow up each individually. A very poor look on Amazon and the cost saving is not work the time I have had to spend following the sellers up to still not have an accurate invoice.