I have a chopper similar to what 02ebz06 from Pampered Chef., I use it mostly for minced onions and chopping nuts. It opens up and washes in dishwasher. I have a manual mandolin I use for slicing potatoes, cucumbers, etc. when I doing a few and want even slices. It as well is dishwasher safe. I have a little electric chopper like a really mini food processor I use for things like chimichurri sauce. I also have the large Cuisinart Food Processoe I’ve only used a few times because of all the cleanup. It does work well for homemade blizzards though. I would use it more if cooking bigger batches.
However, the majority of what I do is still done with a knife.