I've been hard on Warlord Games for some of their Roman stuff, but this is a model that they absolutely got right in the plastic construction.
I like plastic and have painted a number of these already to add to my Roman collection, and these are always fun to paint up and look good. 

So if you are in need of some scorpions, they are certainly a recommendation from me.  I do like the crew especially.

I often change out the kneeling plastic model and use it in the rank and file for a different look.  Its a cool model.
At some point, I'm going to do some photos of my rather large Roman and Viking collections.  They have gotten large.