constant interruptions of Tatatur

minus 1 star would be appropriate
In the first few weeks / months, I was impressed by the keyboard. Then off we went.
Again and again misfires. Without any warning you can suddenly enter what you want, the keyboard does not respond for several minutes. Then suddenly at every short stop shooting the same 5-8 letters out, like so: Buuuuchsssssstabeeeen

Even several times on and off does not help now. Just wait !! Stupid, if you have to write a longer text.

Another problem arises increasingly at: suddenly missing one letter in a word or uppercase is not working. DH between not "noticed the keyboard" the pressing certain keys. Silly if you have to correct 4-5 words retrospectively times in each set. This keeps on quite annoying and unendlcih.

I'll dispose of the keyboard and buy me another.
I have been working at least 20 years with Logitech keyboards and have never had problems. The K520 is apparently a bad design.

The mouse works the way outstanding (in this set were missing again 4 letters)