Rated 4 out of 5 stars
Useful but a nuisance at the same time on both 4.0 and 4.2. It ALWAYS notifies me that it's been disabled at startup and when I enable it it disables ALL addons that are "incompatible" even those I reported to be working; notification of my compatibility rating is visible but ignored when enabled.
EDIT: Should be set to not disable a rated addon unless the browser or addon has been previously updated to a newer version. Alternatively keep the [Compatibility] button visible even when AC Reporter claims to be disabled (Reports compatibility but doesn't give the option to submit feedback, and once enabled it disables everything it considers to be incompatible).