osal
When people say "it doesn't do much for me"...
I have recently read (in the eastern teachings on this) that those of the Doshas Pitta and Vata may do very well on UT; that they may see the most remarkable benefits.
And, that perhaps those of Kapha constitution, might not notice many benefits, or, might need to do this only infrequently, (while the same literature says those past 40 may benefit much... maybe regardless of type? Again, I can't say how, (as I'm processing a lot of ideas) but this makes a certain amount of intuitive sense to me. Just thought I'd mention it for those who are into reading up, and looking into this further.
this may also explain why some are more (naturally) drawn to this than others...