I know there's reviews, but anyone got anything on the toa terrain crawler?

Not sure what you're asking about specifically... opinions on the set from people who own it?

I have the Toa Terrain Crawler. It's definitely a neat playset. I've always wanted to see someone to convert it to run on a LEGO train layout.

The minifigures look nice, but do not resemble the characters as closely as those in the 2005 and 2006 playsets due to some characters sharing head molds. There are some great parts in the set including assorted silver blades (I know any BIONICLE fan is probably swimming in silver blades, but somehow you sometimes still don't have as many of certain kinds as you'd like), some neat recolored Barraki elements on the sea creature mounts (as well as nice blendy giant bat wings), and several other neat parts.

As far as play value is concerned, it's... cool, I guess? The various opening hatches are neat, as is the crane. There are several "solidified air spheres" (yellow-orange Zamor spheres) inside that don't like to stay in place all the time and serve little function in the set except as something for the crane to pick up (there is no launcher for them). Overall there are definitely better LEGO mobile headquarters sets, such as the Agents Mobile Command Center (8635). But if you want a BIONICLE playset, then yeah, I can definitely recommend this one.