The only "drawback" for me is that the only pin I own is Earthshaker - a Pat Lawlor designed system 11, same as Whirlwind. They are only a year apart too. Since I only have room for one more pin at this time, I'd like to have a little diversity. I could offer a trade, but I enjoy ES and haven't quite mastered it. Plus, I have a few mechanical issues that, when addressed, will make the game that much more enjoyable. In a year, I may be willing to pull the trigger on such a trade. But there is plenty of mileage still on ES for me.