I don't mean this in a negative way, but I do agree my experience with oxygen's dnp has been different than the ~5 other sources I've used over the past ~7 years)
I'm very meticulous tracking my dose, weight, and how I feel every day of every dnp cycle.
Things I've noticed:
Oxygen's is much more tolerable in terms of the typical sides - not as warm, not as sweaty, fewer carb cravings, efc. This was a very noticeable difference, and if it wasn't for the change in weight, I would have been worried it was bunk for the first week or so.
The one negative is that Oxygen's dnp is the first time I've had dnp rash.
My last cycle was 15 days, a few days ramping up at 200mg, before settling at 400mg, and by the end I was down 20lbs.
Overall very pleased with it, and personally have no concerns (other than the rash being annoying, but maybe I've just been lucky never getting it until now)
(I know my account here is new, I coulda sworn I had one, I've been around /r/SST and the site for god knows how long, dealt with most Canadian labs, including oxygen ~half a dozen times)