They're awesome, not super awesome, but awesome enough that they need some tweaking for future builds. AP missiles can reliably be expected to blast through one wall and have enough damage left kill a sebillian non-com and most of the time, a guard. This has lead me to the practice of taking several squaddies with rockets. Then in a combat situation I can safely set those squaddies up in a building, spot for those squaddies with another squaddie (armed with a precision rifle so I can take pot-shots at long range) then blast away at the target. I find that even with a 0% chance to hit, the rocket will hit the target 2 out of 3 times, making the investment worthwhile. Likewise, when I'm trying to storm a building because there are plenty of windows on the current building submap, I can see quite easily into one and lace it with AP rocket shots without having to get inside. As the minimum AP cost for firing a rocket is 24, I usually have more than enough AP (even after weight deductions) to get into position or make fine adjustments before shooting.