I always carried my LD IEM with a Gator case on the baggage when I flight, along with my Beta 58 wireless... but tired of the space those occupy, when I saw on he Thomann web site browsing for another IEM (I have actually 6 systems but none have the audio quality of the LD) this Swiff Audio I've decided to try it. What a nice surprise! and now I ask for a microphone, carrying that tiny and beautiful box... the band that worked with me last time they were so curious about that tiny IEM.
PROS: Tiny, compact, beautiful, crystal clear sound, robust, options on connections and the possibility to get stereo (I don't use it, no need) and very good battery duration (they don't lie, I performed for 4 hours, at the end it was half of charge).
CONS: Signal. It loses it easy, in my case I perform all time "inside" the stage, behind FOH, but if as part of the show I go to the public in a dance court, as the last gig, I lost the signal, When I went to the bathroom, I have them on, and just closing the door I lost signal as well, but my friend, on the last gig, I gave it to her and use my traditional LD, she was so happy and she never lost connection, I think it depends on the place.