I have been using HeroScape terrain for the last few months when playing B-Tech, and I love it. Its drastically better than the 3d terrain I had made out of pizza boxes back in high school.
I'm actually using the MechWarrior minis, but I have removed them from the clix base and based them on hexes. I bought them for specifically this purpose, I never really liked the clix version of the game or the story line to go with it. Specifically the marker hexes that came with HeroScape.
I just removed the sticker and painted them black.
The scale is not perfect but I'm happy with it and its much better than a paper map. One thing I do is use two layers of HeroScape terrain to equal 1 level in B-Tech.
I currently have 6 master sets of HeroScape terrain I'm using plus 2 sets of the forgotten road / bridge sets.
I have painted some of the water hexes light green and others dark green to use for forest. They are flat but were the best thing I could come up with that still allowed a mech in the hex.
So far we have only done mech vs mech games, but I hope to add vehicles with in the next few games we play.
JD