They do the job of high quality, sealed, crossoverless monitoring, providing good transient and phase response, minus the high frequencies where they distort due to the nature of the design.
Robustly made, but on should be carefull with the logos, they can easily detatch...
Not as small footprint as one would expect, since they aren't active in the typical sense, they still come with larger external power supply units.
The biggest downside with these is that, paradoxically, due to the size of the single full-range driver, they're really hard to position in a way to avoid comb filtering.