The only negatives are that I give it:
1- poor quality on the battery cover. It is not practical, I broke it by trying to remove it.
(Works just as well without the cache)
2- And a poor quality of the glue that holds the small rubber feet located underneath the keyboard. they all took off after a year.
In short, for 25 EUR is a good price / quality, but if you are looking for "The Keyboard" then it will take you over the top range ...