Recommed WDH? Double receiver for bike rack?

1) Can anyone recommend a good WDH? Just like everyone, I am looking for good quality and ease of use. I hear the Equilizer and Reese WDH mentioned a lot. Anything good or bad about both? Or any other ones recommended?

2) Also, I saw a TV with a receiver that split off into two other receivers, one receiver over another. The bottom receiver was used to tow the trailer and the top receiver had a bike rack on it. I never got the name of the manufacturer and it didn't look homemade. Anyone ever see anything like that before?