i dunno if I'd say worthless, there are just a lot better options for only a fraction more.
Speaking of hondata, I went to Kmotorsports cause I was going to get my car tuned there. And I asked him what he tunes, he name a few different things but not Hondata or Uber. I ask him if he does it and he said he could but he claims hondata is so much more complex to tune than any of the other systems he uses.
food for thought, i don't have first hand experience with hondata.