I do, actually. I previously owned the Meridian Explorer after reading all the hype about it (ordered it on Amazon). Unfortunately I returned it after 25 days as it failed to live up to my expectations. The bass was muddy compared to the AQ Dragonfly, not as crisp or punchy. The level of detail and sonic imaging was very inferior to to the similarly priced Resonessence Labs Herus, which offers a much better dac, higher output int. amp and high resolution features. Perhaps if it was priced competitively at ~$200 it would be worth a buy since it does include support for 192khz over the Dragonfly's 96khz. However its pricing is much closer to the Herus and when compared side by side to the Herus it simply does not offer enough value to justify keeping it.
I feel exactly the opposite.
I have both the Dragonfly and the Explorer, and the difference is very large: the Explorer has a much more pleasant, musical sound. The Dragonfly sounds good if you don't compare it to anything else :/ but compared to the Explorer, the sound is thin, splatty, and grating.
Only reason I haven't gotten rid of the Dragonfly is "who would buy it"? I have it thrown into my laptop case as an emergency backup in case something happens to the Explorer.