Just wanted to state something obvious no one has said yet that I discovered in a test game against myself (pathetic, I know).
Due to location of weapon on front of raider it is rather easy to stick the front end around the corner of LOS bocking terrain and take a clean shot while keeping yourself in 50% cover. I just thought that was pretty cool as I can't think of any other vehicle that can do that off the top of my head.
In my test of wracks they severely weakened an assault squad with after absorbing the initial charge. They also managed to bag a wraithguard squad in another game. I was fairly pleased. The Talos has impressed me the most. It kicked some serious rear end even walking.