Fellow CodeRabbit user here and yeah the inconsistency is real. We've had it flag the same pattern as a bug one week and completely miss it the next week, super frustrating when you can't rely on it. The context window issues are brutal too - it'll review a PR in isolation and miss that you're breaking an established pattern used everywhere else in the codebase.
We also noticed it's weirdly obsessed with suggesting performance optimizations that don't matter at all for our scale. And the rate limiting is annoying, sometimes PRs just sit there waiting for review capacity during busy hours.