I think the side panel dictionary is extremely helpful and well designed. There are too many fantastic features to list, but the AI explanations, links to Tatoeba examples, and ability to add user dictionaries are all extraordinary. I try to have it always available as a slideover on my iPad.
My only suggestion is that it should be available as a separate web address, instead of only being a side panel. As it is, one always has to first access a page like ‘Language Reactor’ and then hit the little icon in the lower right hand corner, instead of directly accessing this fantastic resource.
By the way, thanks for the fantastic hard work!