Can anyone recommend a decent luggage rack for a CX5?
I'm looking for one where the cross bars slide.

 

There are a host of them out there, it would help knowing your year and model.

 

Sorry.
2020.

 

Mazda has their own OEM racks.
There are many more that are cheaper I have no experience with them.
I don't like roof racks now. not keen on placing items on my vehicle roof or being sued if they should fall off.
But back when I was still skiing and less concerned with safety, I had a Thule rack on my wife's Subaru, and it was great.
The following are the top manufactures in my opinion.
Yakima
Make Space For Adventure | Rhino-Rack US
Thule | United States

 

I found these:

Does anyone have a set that they installed and can adjust the cross bar?

 

Hopefully someone has one and can let you know.
Some insight I've found.
Snixwoo is a Chinese company which is why the pricing is about half what you'd expect to pay for a well-known brand.
The company itself does have positive ratings.
Most review websites also give this rack a top-rated review.
With this rack having 4.2 rating on Amazon 81% positive but also 9% with one star.
Major roof rack manufacturers carry liability should parts fail and cause an accident/injury, I found no info about Snixwoo concerning this.
I would also note make sure you have adequate insurance to cover any potential damage/injuries/deaths should the rack fail.
Especially if it is a DYI install.
Liability is the reason I went with an OEM trailer hitch and certified tech installation as I do with my braking systems now.