For many of us gapless is more important than all three. Without it, classical, live recordings, concept albums, etc. are intolerable.
Problems with gapless are all the more frustrating for us when you consider that:
1) FLAC is a gapless format, so one would expect it to work without issue. It is not a "feature," but the way the music was recorded and mastered.
2) Too many manufacturers are advertising their DAPs as "supports gapless," when in fact it does not function.
I'm sure FiiO will get it working as they did with the X3, but putting players into the marketplace with non-operating functions is not something most would forgive if we were discussing a Sony or Apple product.
Give it up already The player is not out on the market yet, It is out on a tour of users to try and work the bugs out everybody on this post knows how important gapless play is to you!