I have heard only good things about all that were mentioned. My experience is limited to Jeff & Bobby Warren. They can make a slow combination fast, but that is not the main reason why I use them.
Their honesty and integrity are their strongest attributes in my opinion. Well....patience may be right up there when I think about it a little more. I think I have worn Jeff slick with questions. I'll know when he reaches his breaking point when he changes his cell phone number.
Edited to add: Can someone teach him how to text? It might extend our relationship.