The come down from desoxyn, (which is d-methamphetamine) would be practically the same as street meth, but it would feel (I'm assuming) cleaner due to lack of street contaminants and such. But all in all I'm sure one would not be able to subjectively tell the difference between the come downs of the two drugs.
it is still a very potent amphetamine that has ruined many lives, and will ruin many more.
But like any drug, it is not the drug that hurts the person, it is the irresponsible use of the drug and a lack of respect for its power.
Off topic there, just my opinion...