I just put this little set together and I must say I love the ARC Trooper, my only gripe is the white printing on the legs has the pinkish hue. You get a small parts bag for the dark red rangefinder in the box that will give you 3 extras as well as 4 dark red visors, great for more troop building.
The printing on the ARF Trooper's helmet is pretty cool and the dark brown Commando Droids are nice, basically they're just super battle droid legs, regular battle droid torso and arms with the Commando Droid head.
The little "walking" cannon is a quick & easy build, probably took me somewhere between 5-10 min to build it. The only thing it's missing was some type of decent control pad tile....guess you have to assume the controls are on the handle bars.
Can't wait to accumulate more of these sets.