During a game vs. smurfs with my solitaire. On his assault turn he was able to kill 5 terminators. Of course, I was able to make 6 attacks in, of which I rolled two - 6's, three fives, and a four. Then for his 4+ inv save he rolled 3's and 2's. So it was a matter of luck too. But on a good roll, the solitaire can be quite devastating.
The next turn his assault squad assaulted in and killed the solitaire no problem. So this is also the drawback.