I own a different Crossroads model, but I follow a Crossroads Owner group on Facebook and the Zinger owners seem to be almost cult-like in their glee for that product line. It's interesting to watch.
We absolutely love our Elevation toy hauler, but nowhere near cult-like love from us. We've had a lot of trouble and it took us years to work through all of the warranty issues. Most of the issues were design flaws and proof that they really weren't ready to enter the market to build toy haulers.
Summary: I don't have any experience with the Zinger line, but I (A) love my Crossroads Elevation and (B) can't believe how many happy Zinger owners I've seen online.