I have been looking at reviews for KO2001 and I have been reading things like "1-500 are okay but after that you should check the kana". Do I need to be weary of incorrect sentences or something of the sort in KO2001?

Thanks.

Sorry if this is a repeat but I didn't feel like searching through tons of old posts of KO2001.

If you look on the google spreadsheet you will notice that the whole of book one has now been checked, mostly twice, and maybe half of book two.