One of the new peices of terrain GW released with Planetstrike is the Blastscape pack, a set of vacua-formed peices similar to the craters I picked up at WHW last year, unlike the Craters however the Blastscape is a very low quality product from all accounts, the detail is very poor when compared to the advertisment pictures and the older craters, and the material is very thin, thin enough that standing a metal model on it can actully break it.
I'd recommened not buying this set until they fix the issues. It's a shame, as the Blastscape was one of the things I really wanted to get from the new kits.