Zahya is the synthesis of what an ID ability should be to incentize the runner to run. If you run R&D or HQ, you always get additionnal value (the first time).
With 40 cards and all the criminals tools, you will have to choose which tool to fit in your deck. As with all 40 cards deck size, it will give you a lot of consistency.
You can probably run a central every other turn easily, and with proper tools, earn on average about 1 per turn (some turns, you get 3, other turns you do not run, etc.) This is amazing value for doing what you should be doing as a runner : run servers!
Fabulous ID, fabulous art, fabulous quote, fabulous card!