DTM primer

DTM primer question...
I usually use a self etching primer on bare metal then go over it with a high build urethane primer. I've been reading that DTM claims no self etch is needed and is better than using the etch primer, having more adhesion properties, easier to work with etc...
I have done half dozen or so cars using my method with great results and hold up well through the years after they have been painted.
Is it worth the change to DTM, or continue my tried and true method?