I have not used the threonate form and have only seen some claims for it. It is very expensive too.

There are many posts on the web that claim it is no better than other forms of absorbable magnesium.

You can google that and find them easily...
I used the key phrase,
does magnesium threonate really work

You can try it, however and come back and tell us about it.
Here is a rat only study:
http://blog.lef.org/2012/01/brain-he...threonate.html
only about 60% of rat studies pertain to human response however.

I am getting great responses myself to magnesium lotion containing magnesium sulfate, and continue to use it. It helps me sleep, and takes the swelling down in my surgical foot. (old surgical scar and damage).