I like both dna and SX chips. They both perform well. What I don't like is LIPO batteries. That's actually why I use the SX more. I vape at 45 to 50 watts so my dna mods with 18650s don't cut it anymore and DNA 200 uses LIPOs. I only use the DNA when I'm at home or short trips when I know that I will have enough battery charge to last my trip.
I too had a ML device with a SX chip. Kept it a week and passed it to someone who wanted it. I could have posted a long list of my thoughts in the ML thread but I chose to only say it was not for me. It wasn't about which device is best or why it may not be. You don't like Li-Po's and I respect your opinion. I guess we could banter back and forth but my opinion is that such banter serves no purpose.
I keep up with and post occasionally here as I'm interested in seeing what actually comes out and the spec's of the Q.
I've used Li-Po's for years. I mostly vape at around 25 watts. I also use 18650's and they work for me also. The majority of my mods are Li-Po. I have a buddy that vapes at around 23-27 watts an he has a 3 cell 18650 device that he says gets 3.5 to 4 days between charges. It's a bit heavy for me but he loves it. All that really matters, I think, is what makes one happy and satisfied.