Chuck's Reviews Transformers Siege Decepticon Spy Patrol and Battle Squad
 

These are two fun sets that in the case of the Battle Squad are digging deep in Transformers history. Rumble and Ratbat are good, but I feel require a Soundwave or Soundblaster to get their full effect. The combined weapon mode of the Battle Squad is surprisingly better than I first thought.

Chuck's Reviews Transformers Siege Decepticon Spy Patrol and Battle Squad - YouTube