It's not super terrible, but it's not very good. The three episodes were produced at a much smaller budget. Also, whereas each episode of Crisis is different from the others, totally different plots, new characters, different running times, each one feeling like a stand alone movie almost, Crash is clearly one long low budget episode broken up into three parts. It's still totally worth getting, but the difference in quality from Scoop Chase to Crash is...considerable.
AD Police doesn't even resemble either show though. IMO it sucks.