More to cristian.klein Rated 5 out of 5 stars
A short version of what DelphyM was writing:
Czech diacritics were haphazard for a long time so we got used to writing Czech without diacritics. After a while, we learnt to read it without problems and, if we are lazy, it's of course easier to write. I am now switching back to diacritics because I like the language and because some people did not go through the same experience and find it much easier to read.
I have just received the dictionary and, so far, I am happy with it.