I'll weigh in and these are just my honest assessments. Although I haven't had a DHM tune, I did order a piece of theirs for my FiST on May 28. No one with DHM can give me an honest answer on when to expect it, and I have been told bad info several times. I have been told at least two times to expect tracking or a follow up email "by the end of the week", and no one replies back and then weeks go by after that and I have to reach out "again" to make sure that I haven't been forgotten about.
I work as a sales manager with a global valve manufacturer, and I understand delays and hold ups. My 1st experience in buying from DHM has been frustrating due to poor communication and an apparent lack of organization on their part. They do apologize and seem to care about the business (strikes me as genuine too), and the only reason that I haven't asked to cancel is because I really want their part..lol. They do good work from what I am told!
With Tune+ Adam always responds promptly, he has been honest (brutally so at times like he can be...lol) with the info that he gives, and the quality of his work has not disappointed me. I'm not an advocate for personalities, and I promote products that give results.
I shall name no names, but when I 1st started working with a tuner who at one time was more active on this forum and now is not active, they could not get my tune right. My ignition corrections were all over the place, and they actually suggested that I might have had a problem with my car that was deeper than tuning could resolve. I was a little upset seeing as how the car had under 1k miles at that time.
On the 1st revision that Tune+ sent me and ever since, my car has run well and from what I have learned by reading threads on this forum my tune is in harmony and everything is running as it should. The results speak for themself, and I have utilized Virtual Dyno to prove the advancements over time.
PS: I like Russ with DHM and base this on a few conversations we have had. I really like all of the big things (engine builds) that DHM is doing, and the couple of hundred $$$'s part that I ordered is probably small potatoes to them and compared to the bigger stuff that they are doing. Hell, one day I might be a customer of his for an engine or big turbo. He strikes me as a solid guy with a great passion and product, that just seems to be struggling to organize the flow with portions of his business.