The conversation system is about as basic as you can get, with a set stock of questions, and absolutely no degree of choice in what you ask them, how you approach your questioning (softly softly, sarcastic, or just playing hardball). It's like Monkey Island never happened.
After a while you might even begin to zone out from how absolutely awful the graphics are. If you're a die-hard adventure apologist with a CSI fixation then step right up, but the rest of you can put your curiosity to one side - especially at its current stupidly high price point.
Some components of the game are so hilarious low-budget and clunky that it detracts significantly from the enjoyment - such as the way the game doesn't allow you to move around the crime scene freely in 3D, preferring an appallingly limited system of on-rails movement