Addendum 09.25.2014:
... And here it is already, the devaluation.
I prefer retrospectively from a star.
Yesterday for the first time Pizza baked in the shallower of the two sheets.
After completion of the hot plate taken from the oven and put to cool in the cold ceramic hob of the cooker.
And then suddenly sagged two diagonally opposite corners of the sheet 5-10 mm high and ploppten then back again.
4-5x sequentially and approximately every 3 seconds. A ghostly spectacle.
Since the metal has been well produced a bit thin, so that it tends on cooling to bimetallartigen deformations.
Thank God it has declined after cooling in the original flat shape.
Well ... still a buy recommendation.
Addendum 02.17.2015:
The lower of the two plates not huppelt during cooling, but as strong as the flat.
Am, however, still not satisfied with the sheets, they work, are easy to clean and cheap.
Still BUY recommendation, but lack good or even findbarer alternative.
BUT ... with "original quality" (original in relation to what / which brand ???), the thin sheets really nothing to do.
Compared with original Miele or AEG sheets (both admired at friends) can not keep up rudimentary rotation Flex sheets in terms Blechjstärke / stability.