These are the IEMs i've been looking for for years. A dynamic driver to give strong, low bass, with an armature driver for clear, precise highs. Detail is a very slightly less than the Super.Fi 5 pro model, but the bass is much improved and goes a lot lower. From low bass up to high treble the detail and sound quality in general are superb. The memory wire around the ears reduces microphonics (the noise of the cord rubbing or banging around), and comfort is great with the rubber tips. After an hour or two I often like to take them out of my ears for a break, but that's the same with most IEMs.

NB Ultimate Ears supplied headphonereviews.org with a unit for review.