It's a pretty decent modernization of Deus Ex. Some of the map changes are cool and add new things, beautifying the originally rather spartan levels. Some of the map changes instead just ruin good level design. Kindof a give and take sorta deal. It does natively have Shifter and BioMod installed though so that's nice for people who don't wanna install those manually.
I wouldn't call it necessary, but it is interesting. It's decent.